hi, I've been doing some reading of this forum and wondered if someone could help.
As subject I have a 20-80 flowmatic and it's pretty much been serviced every year bar a miss 2 winters ago (couldn't get an engineer as servicing boilers was less money than fixing broken ones on call out rates) and currently it's under British Gas Homecare contract
Anyway the problem:
turn on the hot water and the water gets very hot, scalding hot then the burner will stop (pilot light still on), cold water flows out the tap then the burner kicks in and the water temperature climbs again to scalding then the burner cuts out. repeat until hot tap turned off.
Lowering the thermostat control for the hot water merely gets the burner to stop sooner but it's the same hot cold hot pattern. Last call out from BG the engineer said, meh it's an old boiler likely full of sediment. It's old yes but, when bleeding the radiators it's clean water coming out.. Any ideas folks?
<sorry for long first post but figured more info better than no info.. >
As subject I have a 20-80 flowmatic and it's pretty much been serviced every year bar a miss 2 winters ago (couldn't get an engineer as servicing boilers was less money than fixing broken ones on call out rates) and currently it's under British Gas Homecare contract
Anyway the problem:
turn on the hot water and the water gets very hot, scalding hot then the burner will stop (pilot light still on), cold water flows out the tap then the burner kicks in and the water temperature climbs again to scalding then the burner cuts out. repeat until hot tap turned off.
Lowering the thermostat control for the hot water merely gets the burner to stop sooner but it's the same hot cold hot pattern. Last call out from BG the engineer said, meh it's an old boiler likely full of sediment. It's old yes but, when bleeding the radiators it's clean water coming out.. Any ideas folks?
<sorry for long first post but figured more info better than no info.. >