Mend > Home Heating Systems

EA error showing for Worcester Bosch Greenstar CDi?

We awoke one morning recently to no hot water and discovered our boiler was displaying an EA error message. Since then we have had two visits from Worcester Bosh engineers who have replaced the gas valve and I think possibly the ignition electrode - still the same problem. We keep having to press the reset button but after a few days the boiler stops working and the same error message appears. We recently had our gas meter changed and coincidentally the boiler packed in at the same time, so I naturally thought the two might be related. I had the gas meter thoroughly checked tonight and they have advised that there are no problems.

Really grateful for any advice you can provide.

Many thanks,

Marie

Marie
July 2010

Bosch Bosch Greenstar Heating, Home Heating Systems Bosch Greenstar Error

EA error equates to ignition faults, 'not sensing gas'.
When you say you had your meter checked, is the governer (meter regulator) new?
It's the silver-ish valve connecting on top of the meter on the left hand side, these do (very occasionally) cause problems, locking down when gas is pulled through. Not allowing a working pressure at the meter of 21mb

A more unusual direction, but one I have had in the past, is a blocked/partially blocked condense, either the trap in the boiler (fills with a grey sludge), or blocked pipework/outlet.
This would also cause an EA fault as the boiler 'baffles' out because the POC can't escape.
Partial blockages can cause random EA faults (over a time the condense clears allowing boiler to fire, until it fills up again)

Carefree
July 2010