Hi guys,
Looking for advice on customers boiler.
Called to customers house who said no heating, hot water fine. Picked up diverter v/v on route and new room stat as remembered there old one was looking a tad tired.
Got to customers house and carried out initial safety checks and looked at boiler indicator for fault codes but none showing. Tried boiler on hot water and verified that there was a plentiful supply at correct temp, went to room stat and turned up heard click and headed upstairs to check boiler.
It lit fine, went to high burn initially and then turned straight down to low burn no matter what the C/H temp selector dial was moved to.
Flame stayed lit and flow to rads observed with pipes/rads getting lukewarm so put boiler into service mode - set to maximum and everything functioned as advertised, ran on high setting for a few minutes and then turned dial to low burn and boiler modulated down correctly.
After that took boiler out of the service mode and it reverted back to low burn only as demand for heat was still there.
Bit of head scratching, let rads supply pipes cool down and then isolated gas supply, ran hot tap to cool pipes down from heat exchanger, restored gas supply and then turned on the hot tap again & ran for 5 mins, no heat bleed to rad circuit. Isolated gas supply again and then did it again using c/h & checking DHW pipe to check for diverter valve letting by but no temp change there.
I am thinking of the temp limiter sensor - 87229638580.
Any words of wisdom from you guys is greatly appreciated,
Cheers,
Andy (Allgoode)
Looking for advice on customers boiler.
Called to customers house who said no heating, hot water fine. Picked up diverter v/v on route and new room stat as remembered there old one was looking a tad tired.
Got to customers house and carried out initial safety checks and looked at boiler indicator for fault codes but none showing. Tried boiler on hot water and verified that there was a plentiful supply at correct temp, went to room stat and turned up heard click and headed upstairs to check boiler.
It lit fine, went to high burn initially and then turned straight down to low burn no matter what the C/H temp selector dial was moved to.
Flame stayed lit and flow to rads observed with pipes/rads getting lukewarm so put boiler into service mode - set to maximum and everything functioned as advertised, ran on high setting for a few minutes and then turned dial to low burn and boiler modulated down correctly.
After that took boiler out of the service mode and it reverted back to low burn only as demand for heat was still there.
Bit of head scratching, let rads supply pipes cool down and then isolated gas supply, ran hot tap to cool pipes down from heat exchanger, restored gas supply and then turned on the hot tap again & ran for 5 mins, no heat bleed to rad circuit. Isolated gas supply again and then did it again using c/h & checking DHW pipe to check for diverter valve letting by but no temp change there.
I am thinking of the temp limiter sensor - 87229638580.
Any words of wisdom from you guys is greatly appreciated,
Cheers,
Andy (Allgoode)
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