R
Rob247
About 4 weeks ago I had no hot water and there was a vibrating noise which seemed to come from the hot water pump in the airing cupboard and go down to the boiler in the kitchen. I believed it was this as if I fiddle with the hot water pump I could sometimes get it to stop.
I had a plumber come and replace the hot water pump (based on my diagnosis now I think about it) and everything was fine for about a week when we had no hot water again. This time I discovered that the boiler overheat cutoff button had popped out and pressing it in got everything back to normal.
Another week later there is no hot water again. On this occasion the overheat cutoffbutton had popped out and I noticed there was no lights on the hot water pump. This time I had to press the overheat cutoff button and switch the mains on and off to get power to the pump.
At this point I got a different plumber (original plumber said might be boiler but he was not gas safe) to check the boiler who said "Investigated boiler and thermal store, tested stats and temperature differentials. Checked pumps on primary and heating circuits and also checked pump over runs. Found heating and hot water both working and no faults evident." Everything was working when he checked since I last reset the boiler.
Now another week later it's happened again, overheat cutoff popped out and no light on pump. This time I can't get the pump to power back on. If I press the overheat button the boiler it will fire up every few minutes for a few hours until the overheat pops out. During this time I do get hot water.
The boiler is a Glowworm Ultimate approx 15 years old.
I believe the new pump is a Grundfos UPS2 15-50/60, there is also a second older Grundfos pump but I believe this is for the heating.
Any advice, I've already spent £160 for the first plumber and pump and £75 on the second. I have the original plumber coming back Wednesday to look at the pump.
If the hot water pump was faulty or had no power would I still get hot water around the house before the override kicks In and it eventually cools down? From looking at the Grundfos manual online, it looks like the power light should be on all the time. Could the pump cause the boiler to overheat?
I did also have a smart meter fitted on my gas and electricity which happened after the original problem occurred but before the new pump was fitted. Could that be related?
Thanks
Rob
I had a plumber come and replace the hot water pump (based on my diagnosis now I think about it) and everything was fine for about a week when we had no hot water again. This time I discovered that the boiler overheat cutoff button had popped out and pressing it in got everything back to normal.
Another week later there is no hot water again. On this occasion the overheat cutoffbutton had popped out and I noticed there was no lights on the hot water pump. This time I had to press the overheat cutoff button and switch the mains on and off to get power to the pump.
At this point I got a different plumber (original plumber said might be boiler but he was not gas safe) to check the boiler who said "Investigated boiler and thermal store, tested stats and temperature differentials. Checked pumps on primary and heating circuits and also checked pump over runs. Found heating and hot water both working and no faults evident." Everything was working when he checked since I last reset the boiler.
Now another week later it's happened again, overheat cutoff popped out and no light on pump. This time I can't get the pump to power back on. If I press the overheat button the boiler it will fire up every few minutes for a few hours until the overheat pops out. During this time I do get hot water.
The boiler is a Glowworm Ultimate approx 15 years old.
I believe the new pump is a Grundfos UPS2 15-50/60, there is also a second older Grundfos pump but I believe this is for the heating.
Any advice, I've already spent £160 for the first plumber and pump and £75 on the second. I have the original plumber coming back Wednesday to look at the pump.
If the hot water pump was faulty or had no power would I still get hot water around the house before the override kicks In and it eventually cools down? From looking at the Grundfos manual online, it looks like the power light should be on all the time. Could the pump cause the boiler to overheat?
I did also have a smart meter fitted on my gas and electricity which happened after the original problem occurred but before the new pump was fitted. Could that be related?
Thanks
Rob
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