Boiler problem starting when cold

[pingo123]

Hello

My boiler has this strange start up sequence from cold:

1. boiler fires up and runs fine for about 45 seconds and then goes off
2. repeatedly tries to start, maybe 3-10 times, each attempt the boiler is lit for about 1 sec before going off
3. eventually stays on and works ok

Once in a while step 2 goes into a continuous clicking of the pilot light with no lighting and someone has to intervene by turning the boiler off & on. It then works fine immediately. Also once in a while there is no step 2 and it just works fine from the go.

This problem only seems to happen when the boiler is cold, so always first thing in the morning & perhaps the afternoon/eve if it has been off for some time.

This odd behaviour has been going on for about 3-4 years. My boiler is an Ideal FF330 and is around 18 years old.

I've had 2 gas repairmen come to look at it but no joy. One did check the air pressure switch and it was ok. Fan was replaced 3-4 years ago.

In the summer I may remove the circuit board and check for dry joints.

Any ideas any one?

Chris

 

[Jim09876]

Could be the electrode, PCB, thermistor...may help speaking with Ideal? Might be better with a new boiler TBH.

One shall assume your gas safe if your gonna remove that electronic printed circuit board?

 

[pingo123]

Thanks, will contact Ideal. If something can be replaced I would obviously do that than get a new boiler.

I will isolate gas & elec before looking at the PCB.

 

[centralheatking]

Ignite heat spares have most of those parts as re con units at really sensible prices and usually better than new, 24 hr dispatch turn around Centralheatking If you are not GSR then get a specialist engineer in

 

[SimonG]

Not gas safe as he said he's had two gas men in.

Get a decent gas safe engineer in and dont fiddle inside a gas appliance