combi double feed tank/cylinder rads hot but water cold!!! | Bathroom Advice | Plumbers Forums

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Discuss combi double feed tank/cylinder rads hot but water cold!!! in the Bathroom Advice area at Plumbers Forums

M

mannersme

was wondering if anyone could offer any advice, the system was recently drained for a radiator to be changed.
After refilling all rads were bled, as well as a bleed valve situated near the cyclinder.
The radiators are working fine if anything they appear to be a little hotter than normal but the water is running tepid at best,.
When the hot water/central heating is running there are several things happening (not at same time and not at set intervals, just randomly. if that makes sense)
Some banging from the bolier, each `bang` makes the pilot light burn bright orange momentarily.
Sounds like an aircraft taking off from the boiler, after a click sound noise dies down.
pump seems to be trying `to hard` whirring.
can here water whoosing through pump.

I`ve added a picture of cylinder just to be sure, but if it is a combi cylinder then surely draining the rads would have no effect on hot water supply, or is this merely a coincedence??

Also water does heat up if the immersion heater is used, although this takes several hours.

many many thanks in advance for any help, Seems i`m nearing the `christmas approaching everything conk out` period of our household again.....never rains eh!! lol
 

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