Baxi 80E Hot Water Call Triggers Central Heating
Posted: Sun Aug 12, 2018 4:39 pm
Baxi 80E Combi.
When boiler switched to hot water only, call for hot water works fine.
When boiler switched to Central Heating & Hot Water position, and hot water is turned on the diverter valve opens both hot water & central heating (circulation pump switches on) for the duration of hot water running.
Have changed the PCB, Diverter Valve, DHW Thermistor temperature sensor & Safety thermostat.
Have followed same sequence with room stat on & off, and also with timer isolated, all with the same result.
Someone suggested the Plate Heat Exchanger, which I removed, looked OK, and refitted, couldn't see how it would correct my problem!
Any ideas would be much appreciated.
When boiler switched to hot water only, call for hot water works fine.
When boiler switched to Central Heating & Hot Water position, and hot water is turned on the diverter valve opens both hot water & central heating (circulation pump switches on) for the duration of hot water running.
Have changed the PCB, Diverter Valve, DHW Thermistor temperature sensor & Safety thermostat.
Have followed same sequence with room stat on & off, and also with timer isolated, all with the same result.
Someone suggested the Plate Heat Exchanger, which I removed, looked OK, and refitted, couldn't see how it would correct my problem!
Any ideas would be much appreciated.