E80 error code
ACV Prestige Solo E80 error code – Return temperature higher than supply
What does ACV Prestige Solo commercial condensing boiler E80 mean?
ACV documents E80 for the Prestige 42, 50, 75, 100 and 120 Solo range as: Return temperature higher than supply.
The code identifies the condition detected by the product; it does not always identify the failed component on its own. Confirm the full code and exact model before ordering parts or attempting a reset.
The ACV Prestige Solo commercial condensing boiler E80 error code indicates aCV documents E80 for the Prestige 42, 50, 75, 100 and 120 Solo range as: Return temperature higher than supply. This guide explains what the code means, the symptoms and likely causes, the checks that are safe to make, and when to stop and arrange an authorised repair.
Symptoms you may notice
The ACVMax display shows E80. The Prestige boiler may lock out, stop firing, restrict heating operation or show a protective warning.
Common causes
The official Prestige Solo locking-code table associates E80 with return temperature higher than supply. The exact combustion, airflow, pump, sensor, wiring, mixing-circuit, cascade or controller condition must be confirmed on the appliance.
Before you start troubleshooting
Use the display, rating label or product menu to confirm the exact model. Similar-looking codes can have different meanings across product generations and regions.
- Record the complete code before switching the equipment off.
- Check only user-accessible controls, filters and external connections described in the manual.
- Do not open gas, refrigerant, combustion or electrical compartments.
Troubleshooting steps
Record E80 and the exact Prestige Solo model. Check only the display, visible system pressure, power and external conditions permitted by the user instructions. Internal testing requires an approved engineer.
Can you fix this error code yourself?
The safest next step depends on the exact model and the cause behind the code. External checks may help, but a returning fault needs professional diagnosis.
A successful reset is not proof that the underlying issue is fixed. If E80 reappears, note when it happens and give that information to the service engineer.
Reset instructions
Correct the cause first and reset only as allowed by the official instructions. Some conditions clear automatically. If E80 returns, stop resetting and contact an approved installer.
Applicable products and models
Prestige Solo commercial condensing boilerPrestige 42 Solo; Prestige 50 Solo; Prestige 75 Solo; Prestige 100 Solo; Prestige 120 SoloManual A1007856-664Y6200 revision GWhen to contact a professional
Contact ACV support or an approved heating engineer when E80 persists, returns, affects combustion or circulation, or requires internal testing, adjustment or replacement.
Frequently asked questions
What does ACV Prestige Solo commercial condensing boiler E80 mean?
ACV documents E80 for the Prestige 42, 50, 75, 100 and 120 Solo range as: Return temperature higher than supply.
Can I fix ACV Prestige Solo commercial condensing boiler E80 myself?
Some external checks may be suitable for the user, but the result depends on the exact model and cause. Use the official manual and arrange service if the code returns.
Should I reset the product after code E80?
Correct the cause first and reset only as allowed by the official instructions. Some conditions clear automatically. If E80 returns, stop resetting and contact an approved installer.
When should I arrange a repair?
Contact ACV support or an approved heating engineer when E80 persists, returns, affects combustion or circulation, or requires internal testing, adjustment or replacement.