702 Medium
Your boiler has lost communication with its external heating controls, meaning it is struggling to understand when it should be turning on or off.
Technical description: E-Combi EvoE-System EVOClas HE evo CombiClas HE evo System
Typical repair cost: £60-180 (including labour)
DIY fix possible
Check batteries in your wall thermostat or programmer.Ensure the heating controls are within range of the boiler.Turn the boiler off at the main switch, wait 30 seconds, and turn it back on to reset the connection.
Protect yourself from future repair bills
A boiler cover plan would cover faults like 702 — no call-out fees, no surprises.
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Parts commonly replaced
- External RF Receiver
- Room Thermostat
- Communication PCB
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