Hot water / heating problems

[jut]

Heating is off room thermostat is on 0 but when hot water is on the radiators heat up.

I need to change the check valve.

Where is the best place to look for this valve?

 

[diamondgas]

3 Port mate

We're getting there eco...

 

[diamondgas]

jut has left the forum .. sheeeeeeeeeeeeeesh! That's gratitude! :lol: Night all :sleep1:

 

[ecowarm]

Night Diamond

 

[HelenSmith36]

Hi as AWheating as mentioned above , you need to know what type of system you have

 

[hammers4spanner]

3 port i reckon

 

[ecowarm]

Y plan- 3 port - not gravity - no check valve - Problem rads upstairs heating up when heating off - could be 3 port passing or wiring fault or incorrectly piped - has the problem just started? has it always done this?

 

[jut]

Hi jut ... There's a good chance from what you've described so far that the 'silver box', Diverter valve, in picture 1&6 is passing or jamed/stuck ... When just on hot water try pushing the lever underneath it and see if it moves but with some resistance and springs back when released?

The lever moves freely and does not spring back.

 

[jtsplumbing]

It could be that the return from the cylinder is in the wrong place, needs to be last connection back to boiler, how do you know that a check valve is fitted, have you had this fault in the past ??

 

[jut]

It could be that the return from the cylinder is in the wrong place, needs to be last connection back to boiler, how do you know that a check valve is fitted, have you had this fault in the past ??

This is the 1st time i have had this fault, I have lived in this house for 15 years and the system was here when i moved in so i would say it is about 17 years old. It was just a guess on the check valve from what i found on google. but on inspection i could not see a check valve.

 

[jtsplumbing]

If you have got one it could be anywere, under the floor, could have hell of a job finding it !!

 

[diamondgas]

The lever moves freely and does not spring back.

Hi jut It's most likely the silver valve that is passing to the heating when on hot water only. You could try doing the same again with the leaver this time with the electrics to the heating isolated. It should spring back to its rest position. Are you hoping to repair this yourself, by-the-way? If it is the diverter then it'll mean a drain-down and with that comes the potential for lots of issues

 

[jtsplumbing]

When heating/water is off not calling for heat does leaver move then ? if not could be that syncron motor as pack'd in if so and you do-not mind doing a little electrical work (2 wires) a bit fiddl'y with small screws will cost about £15/£20 for part.