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24th October 2007, 05:20 PM
#1
Automated Home Jr Member
POuMA 80 Anyone can help!
Anyone can help? Thanks a lot!
Dear SunBeam,
Thanks for your help in advance. I can not post any here, so i have to send message to you here. Hope you can help!
I have a Puma 80 Combi boiler at home and the centrol heating is not working properly. I have read the forum below:
http://www.automatedhome.co.uk/vbull...ead.php?t=1091
As you said, it maybe divert problem. I have changed the pump and divert already. But it still no CH. I always set the CH as continus. However it turn off after 30s or few mins.
1. I was thinking it is gas in the air. After i bled the air, still no luck.
2. then i think it is pump, i changed pump. Still no luck. But i can feel the CH hot water pipe is warm. the PUmp is really hot.
3. then I changed the divert. The problem still happens (clicking on and off every few secs as it went.) However, i can feel some radiators are working and CH hot water pipe are hot.
4. Then I clean the raidiator. This time the heater rung for a long time, but suddently off and clicking on and off every few secs as it went. Only 1/3 of the bigest radiator seems warm. Then it cool down after heater not running properly.
5. in these two days, i tried to touch the CH cold pipe it seems it much hoter than the CH hot pipe. I think it is unusual.
Really do not know what happen now. Also there is a valve which connect from CH hot pipe to CH cold pipe? Should i close or open it? What is this used for?
Could you help me ASAp? As this happens and we can not get any CH at home. Thanks a lot!
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24th October 2007, 07:31 PM
#2
Moderator
hello Sadkiller
first of all what does the pressure gauge show on the boiler?
it needs to be around 1.5
open the valve that connects the central heating to the cold water until you have 1.5 then close it.
bleed the radiators then top back up to 1.5
turn on the central heating and let us know what's not getting warm.
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24th October 2007, 11:50 PM
#3
Automated Home Jr Member
The question
Thanks for your quick reply! Acturally i did what you have said before, it remained same problem, which is the light turn off after 30s or few mins. Then i was thinking it is Pump problem, so i changed pump. But it still same. Then, i am thininking it is divert problem so i changed again. (The divert was changed last year already). The problme still remains. But sometimes if you let the heater running, some radiators working.
SO i think maybe one of the biggest radiator has problem which block the water flow. So i clean the radiator by bled and pour out the water inside. Then it seems better, nearly all of radiators are working. But the biggest one only have 1/3 working. But after running for few mins (a bit longer than before). Then stop again. Finally, the heater back to previous question, which is turn off after 30s or few mins. Sometimes, the cold pipe seems more hot than the hot CH pipe.
All the best. Hope the explaination is clear.
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25th October 2007, 05:53 AM
#4
Automated Home Jr Member
Water pressure valve
Do you think the problem si from water pressure value which connected to diverter? thanks
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25th October 2007, 09:17 AM
#5
Automated Home Jr Member
CH hot water pipe
Changed back theold moto, When i switch on the heater continus again. it is same. It seems not pump problem.
When I touched the CH Hot water pipe, it can only be warm a short distance from the divert to the the place where there is a switch been connected to the CH cold water pipe.
My boiler is about 1.5 to 2 meters high from floor.
Please help. I have tried all what i can do. Still no luck.
Thanks!
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25th October 2007, 09:46 PM
#6
Automated Home Jr Member
thanks for help
please anyone can help!
BR
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25th October 2007, 10:13 PM
#7
Moderator
does the boiler cut of after 30 secs when on hot water?
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25th October 2007, 10:50 PM
#8
Automated Home Jr Member
thanks
the hot water is working fine. Only CH has problem. Last year I met the same problem. thanks
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27th October 2007, 01:53 PM
#9
Automated Home Jr Member
Please help
i changed the new moto of pump and new divert. the CH hot water pipe seems hot, but the CH hot water pipe seems hot as well. Also, it seems the hot water can not go to Radiator. The heater after running every 30s or 1 min, then shut down again. Headache. Please help.
Also i lost the air vent pin of radiator. try to buy a new one, but can not move the air vent. Anyone knows how to change radiator air vent. Please help.
kind regards,
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27th October 2007, 03:27 PM
#10
Moderator
why not take the pin out of the new bleed instead of changing all the lot.
you might aswell put a new central heating thermister on the boiler, it could be that.
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