Has anyone been through the following tribulations? If so, can you offer me any advice?
1) Boiler make / model (gas or oil)
Glowworm / Micron 70FF (gas)
2) What is / is not happening
Customer reports that about twice per 24 hours the boiler will lock out. A reset will get it going again. While it's working it behaves impeccably.
3) Has ANYTHING else been done / changed recently
Yes. Glowworm recommended a new PCB, which was duly obtained and fitted. The frequency of lockouts reduced from several to about twice per 24 hours.
4) When did it (problem) start
About a month ago.
5) When does it happen? eg, heating coming on or going off
No perceivable pattern has emerged.
6) Anything else you feel may be of relevance
The system is fully pumped but has no controls on it. No roomstat, no cylinder stat, no motorised valves.
When the boiler needs resetting it the reset LED is on constantly and the burner LED flashes at about 2Hz.
TIA
softus
+++++++++++++++++++++++++++++++++++++++++++++
. one more thing...
After the PCB was replaced, Glowworm recommended replacing the thermister. I did so. The new one has resistance of 11KOhm (close enough to the spec) at room temperature, compared to the old one which was 6.7KOhm.
Sadly this made no difference to the frequency of lockouts.
MOD
please use the edit key
1) Boiler make / model (gas or oil)
Glowworm / Micron 70FF (gas)
2) What is / is not happening
Customer reports that about twice per 24 hours the boiler will lock out. A reset will get it going again. While it's working it behaves impeccably.
3) Has ANYTHING else been done / changed recently
Yes. Glowworm recommended a new PCB, which was duly obtained and fitted. The frequency of lockouts reduced from several to about twice per 24 hours.
4) When did it (problem) start
About a month ago.
5) When does it happen? eg, heating coming on or going off
No perceivable pattern has emerged.
6) Anything else you feel may be of relevance
The system is fully pumped but has no controls on it. No roomstat, no cylinder stat, no motorised valves.
When the boiler needs resetting it the reset LED is on constantly and the burner LED flashes at about 2Hz.
TIA
softus
+++++++++++++++++++++++++++++++++++++++++++++
. one more thing...
After the PCB was replaced, Glowworm recommended replacing the thermister. I did so. The new one has resistance of 11KOhm (close enough to the spec) at room temperature, compared to the old one which was 6.7KOhm.
Sadly this made no difference to the frequency of lockouts.
MOD
please use the edit key