Hot water, only hand hot

[Andrewd]

Hello There

I hope someone can help, I seem to be having a melt down of all my appliances this week.

I have, I think a conventional Gas CH & HW. A Stelrad Ideal W gas boiler connected to an insulated cylinder and standard simple contol unit, HW, CH once or twice a day one or both etc. The pump is a Celsia multi head with three settings. 1, 2, 3

Boiler is working ok.

I am getting tepid water despite there being lots of very hot pipes round the pump and into the cylinder.

I suspected the Celsia pump was faulty so unscrewed the central nut and rotated. It didn't spring back into action. It is normally on setting 2. Then I tried switching to setting 3. The pump started working. Tried the water but alas no difference in the water temperature.

As a side point the fuse did go on the control unit earlier in the week, might this be related?

I would be very grateful for any advice.

Thank you

Andrew

 

[ChrisR]

Pump sounds like it's dodgy - hard to tell from your words. Pumps can blow fuses.
The HW temperature SHOULD be controlled by the thermostat on the side of the HW cylinder though - have you got one? If not, it's controlled by the boiler temperature.

 

[Andrewd]

Chris

Thank you for your prompt reply, yes there is a thermostat on the cylinder, about a quarter of the way up. I haven't messed with it.

The pump isn't fused and as I said appears to work in position 3. Not however in position 2. I can hear the flow.

A

 

[ChrisR]

There should be one fuse for the whole of the CH system including the pump.

The pump should of course work in all speeds so it sounds like something is wrong in there. Pumps do stop "between" speeds.

 

[Andrewd]

Thanks Chris

I'm thinking perhaps its the motorised valve. Does anyone have any good diagnostic to tell whether a motorised valve is working? Apologies here I'm a novice but what is the little lever on side of motorised valves for?

Thank you

A

 

[kevplumb]

I'm a novice but what is the little lever on side of motorised valves for?

it locks the valve in mid position

are both pipes from the valve hot

are there any air vents on the pipework

 

[ChrisR]

MOve the little lever on the valve to the position "man" where it latches and stays. Then put your HW on and see. If it works your m. valve or its motor needs replacing. Do look at the tank thermostat - see what number it's set to. Try 55 or 60.

 

[Andrewd]

Gentlemen

Thank you, bizarrely the hot water started working again today, but alas no heating. Yes both pipes hot either side, looking for a vent.

A