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- 7 Mar 2005
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I'd like some input from the pros on this site please...
Firstly - I know (or at least I think I know ) this will require professonal assistance - still I like to know what;s going on in situations like this so I'm not led down the garden path as it wee
Some facts...
1. I've lived in this house for 15 months and have never looked at or thought about how our CH and HW work - they always just "have"
2. We have 2 central circuits in our house - 1 upstairs and 1 downstaris. Both are controlled by room stats. Based on some reading I've done and by visual inspection I assume ths means we have 3 x 2 port valves (1 for each heating circuit and 1 for HW)
Last night everything was working. I usually leave the room stats on just under 18 degs overnight. This morning downstairs felt much cooler than I would have expected.
Felt the rads - cold as a very cold thing! Checked the room stat - it was set above the tem that it should have engaged. I tunred it down, heard the disengagment click - turned it back up heard the engagement click.
What I did NOT hear was the familiar "clockwork" noise coming from above the boiler.
I'm guessing this is a problem with the 2 port valve that controls the downstairs CH.
I removed all the covers etc. above the boiler to reveal the valves, pipes etc. just to have a look.
I got on the web and found out some info re the valves I have - they are Honewell V4043H valves. I read that I could rmove the silver cover and that would show the motor.
I removed the cover and had a peek.
After a bit more reading, I'm fairly convinced it's the motor that is either stuck or knackered. I'm led to the conclusion by the following ...
If I slide he vlave switch to manual (which I assume opens the valve) and press in the visible microswitch, the boiler engages and lights and water flows to the rads.
What doesn't appear to be happening is that the motor is doing anything at all when th room stat engages. I can see the tab that is supposed to make contact with the microswitch but it doesn;t move at all...
Is my fault diagnosis correct? COuld this be an electrical fault?
Is this a case of having the motor repleaced? Or is an entire new valve required?
Long post - manythanks for taking the time to read it
Firstly - I know (or at least I think I know ) this will require professonal assistance - still I like to know what;s going on in situations like this so I'm not led down the garden path as it wee
Some facts...
1. I've lived in this house for 15 months and have never looked at or thought about how our CH and HW work - they always just "have"
2. We have 2 central circuits in our house - 1 upstairs and 1 downstaris. Both are controlled by room stats. Based on some reading I've done and by visual inspection I assume ths means we have 3 x 2 port valves (1 for each heating circuit and 1 for HW)
Last night everything was working. I usually leave the room stats on just under 18 degs overnight. This morning downstairs felt much cooler than I would have expected.
Felt the rads - cold as a very cold thing! Checked the room stat - it was set above the tem that it should have engaged. I tunred it down, heard the disengagment click - turned it back up heard the engagement click.
What I did NOT hear was the familiar "clockwork" noise coming from above the boiler.
I'm guessing this is a problem with the 2 port valve that controls the downstairs CH.
I removed all the covers etc. above the boiler to reveal the valves, pipes etc. just to have a look.
I got on the web and found out some info re the valves I have - they are Honewell V4043H valves. I read that I could rmove the silver cover and that would show the motor.
I removed the cover and had a peek.
After a bit more reading, I'm fairly convinced it's the motor that is either stuck or knackered. I'm led to the conclusion by the following ...
If I slide he vlave switch to manual (which I assume opens the valve) and press in the visible microswitch, the boiler engages and lights and water flows to the rads.
What doesn't appear to be happening is that the motor is doing anything at all when th room stat engages. I can see the tab that is supposed to make contact with the microswitch but it doesn;t move at all...
Is my fault diagnosis correct? COuld this be an electrical fault?
Is this a case of having the motor repleaced? Or is an entire new valve required?
Long post - manythanks for taking the time to read it