No Hot Water But Rads working fine

[andderson365]

Hi,

I removed a radiator to decorate after draining my gravity fed system.

The valves are now capped and I will be replacing the radiator at the weekend. In the mean time I am able to get central heating but I have no hot water.

Will this return when I add the radiator at the weekend or is it likely to be the result of air in the system?

If so any advice on restoring my hot water?

Thanks for advice as always...

 

[45yearsagasman]

my gravity fed system

What do you mean by that? It is very often used incorrectly to describe a system. Do you have any motorised valves near the cylinder, or is it piped up like this:- View media item 30811

 

[andderson365]

Hi 45yearsagasman,

Thanks for the reply.

The hot cylinder (open vented) and cold water tank are up in the loft on same level.

There is a morotised pump next to the hot cylinder I assumed this was for the central heating?

 

[45yearsagasman]

Got anything like these? View media item 38425 View media item 44939

 

[andderson365]

Not exactly, I have taken a few pictures. Hope they explain my setup.

Is it likely that hot water will be restored when I add the radiator back into the system?

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[twgas]

The grey plastic pipework around the hot water tank looks interesting, I'd like to see a few pics from diferent angles of that.
Air is a likely candidate for your problem

 

[andderson365]

The only images I have at moment are:

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The grey pipe runs from my black cold water tank to the hot cylinder with integral f&e. I replaced the missing rad earlier but still no hot water. Where is best place to look for air?

All pipes leaving the cylinder are cold, the wilo pump is running. I loosened the central screw advised elsewhere and there was some gurgling then nothing. On closer inspection I can see a mechanism spinning but no water. Is this how it is supposed to look?

I want to avoid loosening fittings up there if there is a chance it could be anything else.

 

[andderson365]

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I have just connected my mains cold water to the now unused hot washing machine connection to try and force the air out. This resulted in cylinder making noises before I could hear the overflow to outside so knocked it off.

Is it normal for the overfkow to pour when doing this.

 

[andderson365]

For any future readers I was able to fix the problem by connecting my cold wshing machine pipe to my unused hot washing machine pipe and flushing 4-5 times at 20 second bursts. This pushed the airlock out and now the water is hot.