HI again all.
I have had some great support from this site in the past so here's hoping all the good guys are still around (Tony Agile etc !!)
MY thermo shower (Grohe) has recently been delivering varying temperature HW, going from hot to cold and back within seconds. At first suspected the cartridge in the shower, but before buying an expensive new one decided to do some boiler 'tests'.
When the shower was running I felt the DHW flow pipe from the boiler, it indeed went hot to cold and back, switching boiler off and on again each time. I still suspected the shower thermo was closing down the hot flow and this was telling the boiler there was no demand.
BUT, I then tried running my kitchen hot tap, and the same happened, boiler off and on and off etc, so now suspect something like the DHW thermo in the boiler, or sadly, a blocked heat exchanger.
Worked like a dream for a long time (since 1999), with only one having to get the diverter cleaned. Any suggestions? Am I on the right track or miles away?
SB
I have had some great support from this site in the past so here's hoping all the good guys are still around (Tony Agile etc !!)
MY thermo shower (Grohe) has recently been delivering varying temperature HW, going from hot to cold and back within seconds. At first suspected the cartridge in the shower, but before buying an expensive new one decided to do some boiler 'tests'.
When the shower was running I felt the DHW flow pipe from the boiler, it indeed went hot to cold and back, switching boiler off and on again each time. I still suspected the shower thermo was closing down the hot flow and this was telling the boiler there was no demand.
BUT, I then tried running my kitchen hot tap, and the same happened, boiler off and on and off etc, so now suspect something like the DHW thermo in the boiler, or sadly, a blocked heat exchanger.
Worked like a dream for a long time (since 1999), with only one having to get the diverter cleaned. Any suggestions? Am I on the right track or miles away?
SB