Timer Firing Up Boiler for Water, not for Heating

[Mark Walsham]

Hi everyone,

I have a Climote (but re-badged by Scottish Electric) timer, which I think has developed a fault, and need some advice as I have a problem.

First off, I have a Valiant traditional boiler, pressure good, power good and regular servicing. I note that when I ask the Climote for HW, the boiler fires up, lights and starts to heat the water.

If I try the same for Heating, and the Climote says it is on, but nothing happens on the boiler at all.

I have checked the external thermostat, and it is reporting 10dg lower temp than the target temp - so I don't think it is that.

Any ideas what this might be. Have reset the timer, checked the boiler pressure and power and all seems good.

Appreciate any thoughts or ideas.

Cheers, Mark.

 

[Harvest Fields]

Do you have an airing cupboard? Maybe a valve issue in there.

 

[Best]

Hello, - do you have any motorised valves (zone valves)? A motorised valve for radiators could have failed and can be manually switched on with the lever slide button.
Check if you have a zone thermostat, (often wall mounted) that it is at correct temperature.

 

[Mark Walsham]

Do you have an airing cupboard? Maybe a valve issue in there.

yes, I do indeed have an airing cupboard, where the pump is installed, and the storage heating tank. I will have a good root around in there and look for anything obvious. Thanks.

 

[Mark Walsham]

Hello, - do you have any motorised valves (zone valves)? A motorised valve for radiators could have failed and can be manually switched on with the lever slide button.
Check if you have a zone thermostat, (often wall mounted) that it is at correct temperature.

I will re-check the zone thermostat tomorrow in the day light, but when I check it via the app, it seems to be reporting the right temp (17deg), but will check it. I will also check the airing cupboard for the diverter valve too, and from memory it is the usual electro-magnetic type, with a manual override.

Again - thanks - I had assumed that regardless of the pump or diverter working, the boiler would fire up to start the process of heating the water for the system - or am I just being silly (probably)!

Thanks again. Mark.

 

[Harvest Fields]

It will look something like his mate but not necessarily exact. You will more then likely find it is not motoring to the heating position and probably needs a new motor fitting.

 

[Harvest Fields]

The motorised valve send live back to the boiler. Which then tells the boiler to come on.

 

[Best]

I will re-check the zone thermostat tomorrow in the day light, but when I check it via the app, it seems to be reporting the right temp (17deg), but will check it. I will also check the airing cupboard for the diverter valve too, and from memory it is the usual electro-magnetic type, with a manual override.

Again - thanks - I had assumed that regardless of the pump or diverter working, the boiler would fire up to start the process of heating the water for the system - or am I just being silly (probably)!

Thanks again. Mark.

Usually the motorised valves are actually what puts the power to the boiler, not your programmer or thermostat.
The valve gets power to open from programmer and stat, but the valve has to open fully to operate a micro switch inside it, switching a permanent live to boiler. If there is mechanical or micro switch failure in the valve, then boiler might not work
Edit, Harvest Fields beat me to it, and said it simpler.

 

[Harvest Fields]

Usually the motorised valves are actually what puts the power to the boiler, not your programmer or thermostat.
The valve gets power to open from programmer and stat, but the valve has to open fully to operate a micro switch inside it, switching a permanent live to boiler. If there is mechanical or micro switch failure in the valve, then boiler might not work
Edit, Harvest Fields beat me to it, and said it simpler.

Still an awesome and informative post Best. For me it is normally the other way around. Shaun normally gets there as I’m typing.

 

[Best]

Still an awesome and informative post Best. For me it is normally the other way around. Shaun normally gets there as I’m typing.

I typed too much and you then beat me in the race.
Your post is much easier to understand than my rambling.

 

[Harvest Fields]

I typed too much and you then beat me in the race.
Your post is much easier to understand than my rambling.

Too busy for long answers mate. People are lucky to get more then a paragraph out of me normally.

 

[Best]

Too busy for long answers mate. People are lucky to get more then a paragraph out of me normally.

I should do same. No point in over complicating things. My customers rarely listen anyhow.

 

[Harvest Fields]

I find that if people need more of an explanation they will ask. If not then the mist understand

 

[Best]

I find that if people need more of an explanation they will ask. If not then the mist understand

Customers are a subhuman species.

 

[ShaunCorbs]

Still an awesome and informative post Best. For me it is normally the other way around. Shaun normally gets there as I’m typing.

i was gaming so thats why

and i normally use bullet-points