Hi all
Read every thread about Potterton Puma diverter valves and still confused!
Puma 100 permanent pilot
CH working fine, fires up morning and evening and all rads start to warm within minutes.
Turn on DHW and can run as much as I want, completely filling a bath, turn off hot water and pilot light goes out, I guess due to over temp stat doing its job.
Noticed back in summer when heating was off if I ran hot water repeatedly for a few second at a time the boiler would lock out but not if run for a minute or two and then not used.
My thoughts are that the diverter valve is sticking in the hot water position so that the excess heat in the heat exchanger cannot be dissipated thought the central heating system .......... when the heating is off and I run hot water then turn it off although the pump is running the CH flow does not heat up (I am sure it used to).
So could it be the diverter valve and could I get away with just changing the wax capsule which looks easy and costs £20 or do I have to change the whole thing at 5X cost and much more hassle?
Thanks
Read every thread about Potterton Puma diverter valves and still confused!
Puma 100 permanent pilot
CH working fine, fires up morning and evening and all rads start to warm within minutes.
Turn on DHW and can run as much as I want, completely filling a bath, turn off hot water and pilot light goes out, I guess due to over temp stat doing its job.
Noticed back in summer when heating was off if I ran hot water repeatedly for a few second at a time the boiler would lock out but not if run for a minute or two and then not used.
My thoughts are that the diverter valve is sticking in the hot water position so that the excess heat in the heat exchanger cannot be dissipated thought the central heating system .......... when the heating is off and I run hot water then turn it off although the pump is running the CH flow does not heat up (I am sure it used to).
So could it be the diverter valve and could I get away with just changing the wax capsule which looks easy and costs £20 or do I have to change the whole thing at 5X cost and much more hassle?
Thanks