Common problems guide

The most common Vokera Eclipse problems

The faults most likely to send a Vokera Eclipse into lockout — with plain-English causes, what to check first, estimated repair costs and whether you need a Gas Safe engineer.

This model is discontinued. Parts can be harder to source and expensive. If repair costs are mounting, a new A-rated boiler may be the smarter choice.

The 6 most common faults

01

18 High Engineer

Your boiler has detected that the water inside the system has become dangerously overheated and has shut itself down to prevent damage.

Est. cost: £150-250
Parts: NTC thermistor, Primary heat exchanger, Pump

Full guide for 18

02

19 High Engineer

Your boiler has detected that the water returning to it is dangerously hot, causing it to shut down to prevent damage or overheating.

Est. cost: £150-250
Parts: Return NTC sensor, Primary heat exchanger, Pump

Full guide for 19

03

24 High Engineer

Your boiler has detected that the water temperature sensors are reading the pipes in the wrong order, preventing it from safely heating your home.

Est. cost: £120-200
Parts: NTC Thermistor, Wiring harness, PCB

Full guide for 24

04

30 High Engineer

Your boiler has detected an abnormal temperature difference between the water leaving and returning to it, suggesting a major circulation issue like a blockage or a pump failure.

Est. cost: £150-300
Parts: Central heating pump, Return temperature sensor, System filter

Full guide for 30

05

65 High Engineer

Your boiler is struggling to push air through its system because the internal fan is not spinning at the right speed, causing the unit to stop working for safety reasons.

Est. cost: £150-300
Parts: Flue fan assembly, Fan wiring harness, Printed Circuit Board (PCB)

Full guide for 65

06

12 High Engineer

Your boiler is unable to clear away the water it creates during normal operation because the internal drainage pipe is blocked.

Est. cost: £90-160
Parts: Condensate trap, Siphonic drain pipe, Condensate hose

Full guide for 12

Parts most often replaced

on the Vokera Eclipse

NTC thermistorPrimary heat exchangerPumpReturn NTC sensorNTC ThermistorWiring harness

Based on parts cited in our fault code database. Your engineer will confirm what's actually needed after diagnosis.

Call a Gas Safe engineer if…

You can smell gas or see signs of a leak
The Vokera shows an Emergency or High severity code
The boiler keeps locking out after repeated resets
You've tried the DIY checks and the fault hasn't cleared
There's visible water leaking from the boiler
The flame is yellow or orange instead of blue

See the full 75-code list for the Vokera Eclipse