Hamworthy error codes
Find the meaning of Hamworthy fault, warning and status codes, with model context, documented causes, safe checks and links to available manufacturer guidance.
93documented codes
1products and models
1product categories
About Hamworthy error codes
An error code is a diagnostic clue, not a complete repair diagnosis. Hamworthy may reuse similar-looking codes across different products, model generations or regions, so always confirm the complete code and exact model before following instructions or ordering parts.
This profile connects every indexed Hamworthy code to its dedicated explanation page. Each page is structured around the search intent: a quick meaning, symptoms, likely causes, safe troubleshooting, reset guidance, applicable products and the point at which professional help is appropriate. Records marked as verified include the manufacturer or another authoritative technical source.
Start with the code shown on the display, then narrow the result by product or model. Do not assume that a reset has repaired the underlying fault. If a code returns, the product is unsafe, or diagnosis requires internal electrical, gas, refrigerant or moving components, stop and use an authorised technician.
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Popular Hamworthy codes
430Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom430 — Dyn water pressure too lowHamworthy’s official fault-code system identifies code 430 on the Purewell VariHeat mk2 as “Dyn water pressure too low”.…429Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom429 — Dyn water pressure too highHamworthy’s official fault-code system identifies code 429 on the Purewell VariHeat mk2 as “Dyn water pressure too high”.…387Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom387 — Air pressure toleranceHamworthy’s official fault-code system identifies code 387 on the Purewell VariHeat mk2 as “Air pressure tolerance”. The code…386Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom386 — Fan speed toleranceHamworthy’s official fault-code system identifies code 386 on the Purewell VariHeat mk2 as “Fan speed tolerance”. The code…323Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom323 — Water pressure 3 too lowHamworthy’s official fault-code system identifies code 323 on the Purewell VariHeat mk2 as “Water pressure 3 too low”.…322Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom322 — Water pressure 3 too highHamworthy’s official fault-code system identifies code 322 on the Purewell VariHeat mk2 as “Water pressure 3 too high”.…177Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom177 — Water pressure 2 too lowHamworthy’s official fault-code system identifies code 177 on the Purewell VariHeat mk2 as “Water pressure 2 too low”.…176Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom176 — Water pressure 2 too highHamworthy’s official fault-code system identifies code 176 on the Purewell VariHeat mk2 as “Water pressure 2 too high”.…
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10Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom10 — Outside temperature sensor errorHamworthy’s official fault-code system identifies code 10 on the Purewell VariHeat mk2 as “Outside temperature sensor error”. The…100Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom100 — Two clock time mastersHamworthy’s official fault-code system identifies code 100 on the Purewell VariHeat mk2 as “Two clock time masters”. The…102Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom102 — Clock time master without power reserveHamworthy’s official fault-code system identifies code 102 on the Purewell VariHeat mk2 as “Clock time master without power…105Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom105 — Maintenance messageHamworthy’s official fault-code system identifies code 105 on the Purewell VariHeat mk2 as “Maintenance message”. The code belongs…109Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom109 — Supervision boiler temperatureHamworthy’s official fault-code system identifies code 109 on the Purewell VariHeat mk2 as “Supervision boiler temperature”. The code…110Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom110 — SLT lockoutHamworthy’s official fault-code system identifies code 110 on the Purewell VariHeat mk2 as “SLT lockout”. The code belongs…111Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom111 — Temperature limiter safety shutdownHamworthy’s official fault-code system identifies code 111 on the Purewell VariHeat mk2 as “Temperature limiter safety shutdown”. The…113Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom113 — Flue gas supervision equipment has cut outHamworthy’s official fault-code system identifies code 113 on the Purewell VariHeat mk2 as “Flue gas supervision equipment has…117Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom117 — Water pressure too highHamworthy’s official fault-code system identifies code 117 on the Purewell VariHeat mk2 as “Water pressure too high”. The…118Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom118 — Water pressure too low 6Hamworthy’s official fault-code system identifies code 118 on the Purewell VariHeat mk2 as “Water pressure too low 6”.…119Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom119 — Water pressure switch has cut out 6Hamworthy’s official fault-code system identifies code 119 on the Purewell VariHeat mk2 as “Water pressure switch has cut…125Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom125 — Maximum boiler temperature exceededHamworthy’s official fault-code system identifies code 125 on the Purewell VariHeat mk2 as “Maximum boiler temperature exceeded”. The…128Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom128 — Loss of flame during operationHamworthy’s official fault-code system identifies code 128 on the Purewell VariHeat mk2 as “Loss of flame during operation”.…130Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom130 — Flue gas temperature limit exceededHamworthy’s official fault-code system identifies code 130 on the Purewell VariHeat mk2 as “Flue gas temperature limit exceeded”.…132Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom132 — Safety shutdownHamworthy’s official fault-code system identifies code 132 on the Purewell VariHeat mk2 as “Safety shutdown”. The code belongs…133Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom133 — Safety time for establishment of flame exceededHamworthy’s official fault-code system identifies code 133 on the Purewell VariHeat mk2 as “Safety time for establishment of…146Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom146 — Sensor/actuator configuration errorHamworthy’s official fault-code system identifies code 146 on the Purewell VariHeat mk2 as “Sensor/actuator configuration error”. The code…151Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom151 — BMU fault internalHamworthy’s official fault-code system identifies code 151 on the Purewell VariHeat mk2 as “BMU fault internal”. The code…152Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom152 — Parameterization errorHamworthy’s official fault-code system identifies code 152 on the Purewell VariHeat mk2 as “Parameterization error”. The code belongs…153Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom153 — Unit manually lockedHamworthy’s official fault-code system identifies code 153 on the Purewell VariHeat mk2 as “Unit manually locked”. The code…160Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom160 — Fan speed threshold not reachedHamworthy’s official fault-code system identifies code 160 on the Purewell VariHeat mk2 as “Fan speed threshold not reached”.…162Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom162 — Air pressure switch does not closeHamworthy’s official fault-code system identifies code 162 on the Purewell VariHeat mk2 as “Air pressure switch does not…164Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom164 — Flow/pressure switch heating circuit errorHamworthy’s official fault-code system identifies code 164 on the Purewell VariHeat mk2 as “Flow/pressure switch heating circuit error”.…166Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom166 — Air pressure switch error does not openHamworthy’s official fault-code system identifies code 166 on the Purewell VariHeat mk2 as “Air pressure switch error does…170Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom170 — Water pressure primaryHamworthy’s official fault-code system identifies code 170 on the Purewell VariHeat mk2 as “Water pressure primary”. The code…176Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom176 — Water pressure 2 too highHamworthy’s official fault-code system identifies code 176 on the Purewell VariHeat mk2 as “Water pressure 2 too high”.…177Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom177 — Water pressure 2 too lowHamworthy’s official fault-code system identifies code 177 on the Purewell VariHeat mk2 as “Water pressure 2 too low”.…178Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom178 — Limit thermostat HC1Hamworthy’s official fault-code system identifies code 178 on the Purewell VariHeat mk2 as “Limit thermostat HC1”. The code…179Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom179 — Limit thermostat HC2Hamworthy’s official fault-code system identifies code 179 on the Purewell VariHeat mk2 as “Limit thermostat HC2”. The code…183Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom183 — Unit in parameterization modeHamworthy’s official fault-code system identifies code 183 on the Purewell VariHeat mk2 as “Unit in parameterization mode”. The…193Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom193 — Start preventionHamworthy’s official fault-code system identifies code 193 on the Purewell VariHeat mk2 as “Start prevention”. The code belongs…20Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom20 — Boiler temperature 1 sensor errorHamworthy’s official fault-code system identifies code 20 on the Purewell VariHeat mk2 as “Boiler temperature 1 sensor error”.…217Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom217 — Sensor errorHamworthy’s official fault-code system identifies code 217 on the Purewell VariHeat mk2 as “Sensor error”. The code belongs…25Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom25 — Boiler temperature solid fuel sensor errorHamworthy’s official fault-code system identifies code 25 on the Purewell VariHeat mk2 as “Boiler temperature solid fuel sensor…26Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom26 — Common flow temperature sensor errorHamworthy’s official fault-code system identifies code 26 on the Purewell VariHeat mk2 as “Common flow temperature sensor error”.…28Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom28 — Flue gas temperature sensor faultHamworthy’s official fault-code system identifies code 28 on the Purewell VariHeat mk2 as “Flue gas temperature sensor fault”.…30Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom30 — Flow temperature 1 sensor errorHamworthy’s official fault-code system identifies code 30 on the Purewell VariHeat mk2 as “Flow temperature 1 sensor error”.…31Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom31 — Flow temperature 1 cooling sensor errorHamworthy’s official fault-code system identifies code 31 on the Purewell VariHeat mk2 as “Flow temperature 1 cooling sensor…32Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom32 — Flow temperature 2 sensor errorHamworthy’s official fault-code system identifies code 32 on the Purewell VariHeat mk2 as “Flow temperature 2 sensor error”.…320Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom320 — DHW charging temp sensor faultHamworthy’s official fault-code system identifies code 320 on the Purewell VariHeat mk2 as “DHW charging temp sensor fault”.…321Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom321 — DHW outlet sensor faultHamworthy’s official fault-code system identifies code 321 on the Purewell VariHeat mk2 as “DHW outlet sensor fault”. The…322Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom322 — Water pressure 3 too highHamworthy’s official fault-code system identifies code 322 on the Purewell VariHeat mk2 as “Water pressure 3 too high”.…323Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom323 — Water pressure 3 too lowHamworthy’s official fault-code system identifies code 323 on the Purewell VariHeat mk2 as “Water pressure 3 too low”.…324Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom324 — Same sensor Input BXHamworthy’s official fault-code system identifies code 324 on the Purewell VariHeat mk2 as “Same sensor Input BX”. The…325Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom325 — Same sensor Input BX/extension moduleHamworthy’s official fault-code system identifies code 325 on the Purewell VariHeat mk2 as “Same sensor Input BX/extension module”.…326Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom326 — Same sensor Input BX/mixing valve groupHamworthy’s official fault-code system identifies code 326 on the Purewell VariHeat mk2 as “Same sensor Input BX/mixing valve…327Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom327 — Same function mixing valve groupHamworthy’s official fault-code system identifies code 327 on the Purewell VariHeat mk2 as “Same function mixing valve group”.…328Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom328 — Same function mixing valve groupHamworthy’s official fault-code system identifies code 328 on the Purewell VariHeat mk2 as “Same function mixing valve group”.…329Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom329 — Same funct ext module/mixing valve groupHamworthy’s official fault-code system identifies code 329 on the Purewell VariHeat mk2 as “Same funct ext module/mixing valve…330Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom330 — Sensor input BX1 no functionHamworthy’s official fault-code system identifies code 330 on the Purewell VariHeat mk2 as “Sensor input BX1 no function”.…331Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom331 — Sensor input BX2 no functionHamworthy’s official fault-code system identifies code 331 on the Purewell VariHeat mk2 as “Sensor input BX2 no function”.…332Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom332 — Sensor input BX3 no functionHamworthy’s official fault-code system identifies code 332 on the Purewell VariHeat mk2 as “Sensor input BX3 no function”.…333Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom333 — Sensor input BX4 no functionHamworthy’s official fault-code system identifies code 333 on the Purewell VariHeat mk2 as “Sensor input BX4 no function”.…335Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom335 — Sensor input BX21 no functionHamworthy’s official fault-code system identifies code 335 on the Purewell VariHeat mk2 as “Sensor input BX21 no function”.…336Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom336 — Sensor input BX22 no functionHamworthy’s official fault-code system identifies code 336 on the Purewell VariHeat mk2 as “Sensor input BX22 no function”.…337Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom337 — Sensor input B1 no functionHamworthy’s official fault-code system identifies code 337 on the Purewell VariHeat mk2 as “Sensor input B1 no function”.…338Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom338 — Sensor input B12 no functionHamworthy’s official fault-code system identifies code 338 on the Purewell VariHeat mk2 as “Sensor input B12 no function”.…353Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom353 — Cascade flow sensor B10 missingHamworthy’s official fault-code system identifies code 353 on the Purewell VariHeat mk2 as “Cascade flow sensor B10 missing”.…372Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom372 — Limit thermostat HC3Hamworthy’s official fault-code system identifies code 372 on the Purewell VariHeat mk2 as “Limit thermostat HC3”. The code…38Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom38 — Flow temperature primary controllerHamworthy’s official fault-code system identifies code 38 on the Purewell VariHeat mk2 as “Flow temperature primary controller”. The…385Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom385 — Mains undervoltageHamworthy’s official fault-code system identifies code 385 on the Purewell VariHeat mk2 as “Mains undervoltage”. The code belongs…386Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom386 — Fan speed toleranceHamworthy’s official fault-code system identifies code 386 on the Purewell VariHeat mk2 as “Fan speed tolerance”. The code…387Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom387 — Air pressure toleranceHamworthy’s official fault-code system identifies code 387 on the Purewell VariHeat mk2 as “Air pressure tolerance”. The code…388Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom388 — DHW sensor no functionHamworthy’s official fault-code system identifies code 388 on the Purewell VariHeat mk2 as “DHW sensor no function”. The…40Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom40 — Return temperature 1 sensor errorHamworthy’s official fault-code system identifies code 40 on the Purewell VariHeat mk2 as “Return temperature 1 sensor error”.…429Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom429 — Dyn water pressure too highHamworthy’s official fault-code system identifies code 429 on the Purewell VariHeat mk2 as “Dyn water pressure too high”.…430Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom430 — Dyn water pressure too lowHamworthy’s official fault-code system identifies code 430 on the Purewell VariHeat mk2 as “Dyn water pressure too low”.…432Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom432 — Function ground missingHamworthy’s official fault-code system identifies code 432 on the Purewell VariHeat mk2 as “Function ground missing”. The code…433Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom433 — Heat exchanger temperatureHamworthy’s official fault-code system identifies code 433 on the Purewell VariHeat mk2 as “Heat exchanger temperature”. The code…46Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom46 — Cascade return temperature sensor errorHamworthy’s official fault-code system identifies code 46 on the Purewell VariHeat mk2 as “Cascade return temperature sensor error”.…47Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom47 — Common return termperature sensor errorHamworthy’s official fault-code system identifies code 47 on the Purewell VariHeat mk2 as “Common return termperature sensor error”.…50Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom50 — DHW temperature sensor/thermostat 1 faultHamworthy’s official fault-code system identifies code 50 on the Purewell VariHeat mk2 as “DHW temperature sensor/thermostat 1 fault”.…52Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom52 — DHW temperature sensor/thermostat 2 faultHamworthy’s official fault-code system identifies code 52 on the Purewell VariHeat mk2 as “DHW temperature sensor/thermostat 2 fault”.…54Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom54 — Flow temperature DHWHamworthy’s official fault-code system identifies code 54 on the Purewell VariHeat mk2 as “Flow temperature DHW”. The code…57Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom57 — DHWHamworthy’s official fault-code system identifies code 57 on the Purewell VariHeat mk2 as “DHW”. The code belongs to…60Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom60 — Room temperature 1, sensor errorHamworthy’s official fault-code system identifies code 60 on the Purewell VariHeat mk2 as “Room temperature 1, sensor error”.…61Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom61 — Fault room unit 1Hamworthy’s official fault-code system identifies code 61 on the Purewell VariHeat mk2 as “Fault room unit 1”. The…65Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom65 — Room temperature 2Hamworthy’s official fault-code system identifies code 65 on the Purewell VariHeat mk2 as “Room temperature 2”. The code…68Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom68 — Room temperature 3Hamworthy’s official fault-code system identifies code 68 on the Purewell VariHeat mk2 as “Room temperature 3”. The code…70Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom70 — Storage tank temperature 1 (top)Hamworthy’s official fault-code system identifies code 70 on the Purewell VariHeat mk2 as “Storage tank temperature 1 (top)”.…71Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom71 — Storage tank temperature 2 (bottom)Hamworthy’s official fault-code system identifies code 71 on the Purewell VariHeat mk2 as “Storage tank temperature 2 (bottom)”.…72Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom72 — Storage tank temrperature 3 (middle)Hamworthy’s official fault-code system identifies code 72 on the Purewell VariHeat mk2 as “Storage tank temrperature 3 (middle)”.…73Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom73 — Collector temperature 1Hamworthy’s official fault-code system identifies code 73 on the Purewell VariHeat mk2 as “Collector temperature 1”. The code…74Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom74 — Collector temperature 2 sensor errorHamworthy’s official fault-code system identifies code 74 on the Purewell VariHeat mk2 as “Collector temperature 2 sensor error”.…78Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom78 — Water pressureHamworthy’s official fault-code system identifies code 78 on the Purewell VariHeat mk2 as “Water pressure”. The code belongs…81Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom81 — LPB short-circuit or no bus power supplyHamworthy’s official fault-code system identifies code 81 on the Purewell VariHeat mk2 as “LPB short-circuit or no bus…82Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom82 — LPB address collisionHamworthy’s official fault-code system identifies code 82 on the Purewell VariHeat mk2 as “LPB address collision”. The code…83Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom83 — BSB-Wire short-circuit or no communicationHamworthy’s official fault-code system identifies code 83 on the Purewell VariHeat mk2 as “BSB-Wire short-circuit or no communication”.…84Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom84 — BSB wire address collisionHamworthy’s official fault-code system identifies code 84 on the Purewell VariHeat mk2 as “BSB wire address collision”. The…85Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom85 — BSB radio communication faultHamworthy’s official fault-code system identifies code 85 on the Purewell VariHeat mk2 as “BSB radio communication fault”. The…91Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom91 — Data overrun in EEPROMHamworthy’s official fault-code system identifies code 91 on the Purewell VariHeat mk2 as “Data overrun in EEPROM”. The…98Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom98 — Mixing valve clip in 1 faultHamworthy’s official fault-code system identifies code 98 on the Purewell VariHeat mk2 as “Mixing valve clip in 1…99Hamworthy · Purewell VariHeat mk2 condensing boiler · United Kingdom99 — Mixing valve clip in 2 faultHamworthy’s official fault-code system identifies code 99 on the Purewell VariHeat mk2 as “Mixing valve clip in 2…