BoilerFaultCodesVokera E080 Fault Code
The Vokera E080 fault code means: your boiler has detected that the water returning from your radiators is too hot or the temperature difference is incorrect, causing the system to shut down for safety.. It appears on 12 Vokera models in our database.
Technical description: fault return line probe / return line probe overtemperature / outlet/return line probe differential alarm
What causes the Vokera E080 fault?
This fault occurs when the internal sensors detect that the water returning from your heating system is significantly hotter than expected or is rising too quickly. The most common reasons are a blockage in the central heating pipes, a failing pump that isn't moving water efficiently, or a sensor that has become faulty and is sending incorrect data to the boiler's computer.
This issue is most frequent during the first cold spell of autumn when heating systems are turned back on after months of inactivity, often revealing stuck pumps or airlocks.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
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A cover plan would handle faults like E080: no call-out fees, no surprise bills.
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Vokera models that show the E080 fault code
Click a model for the full fault code list and model-specific repair notes.
- Evolve Repair: £120-280
- Evolve S Repair: £150-250
- Pinnacle Combi Repair: £90-160
- Pinnacle System Repair: £100-£180
- Synergy Combi Repair: £120-190
- Synergy System Repair: £90-160
- Unica MAX Repair: £150-250
- Unica MAX Combi Repair: £120-220
- Unica MAX System Repair: £100-220
- Vision Plus 35C/40C Repair: £150-250
- Vision S Repair: £120-220
- Vision System Sgc Repair: £150-250
Source
Vokera E080 fault code information on this page is sourced and cross-checked against the official Vokera service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026