Faulty thermostat?

[Ian H]

Good morning,

Yesterday I woke upto a boiling house, 22degrees even though my thermostat was set to 16. Last night the heating wouldn't kick in even though the thermostat said it was connected.

It's a Honeywell Round and Intergas Compact Combi eco RF 36.

The hot water works fine.

I do have an Intrgas Gateway that we don't use and when I connected it up last night it wouldn't connect to the boiler, maybe because it's miles away.

Does this sound like the thermostat is faulty?

Thanks

 

[CountryFan]

It could be. Have you changed the batteries in the thermostat? If yes, are they good quality alkaline ones?

 

[Ian H]

No, same batteries are in. Could they we weak and not letting it function properly?

 

[CountryFan]

Could they we weak and not letting it function properly?

Absolutely.

 

[Ian H]

I'll try that as soon as I get home. Thanks very much

 

[ericmark]

I got this thermostat for late mother's house, over time it got worse and worse, with me moving it closer and closer to the base. She also had this one,

and when I started to read instructions, it had a built-in safety feature, and should it not get a signal from the thermostat every half hour it closed down, but the programmable one had no such safety system.

When I looked at the price, a smart thermostat was so little extra to buy to the one I got, it was simply not worth not getting a smart version. I can look at the smart thermostat I have now, and see what it is doing. I did have a problem with geo-fencing with the Nest Gen 3, each time I walked towards it, I was detected as being home, and it lit up orange showing heating was running, but the EE mast it seems was down, so it thought by phone signal I was not home, so would turn heating off again, it was not until I looked on the PC did I see it showed me as away. Geo-fencing now turned off, like nearly every other feature on the Nest thermostat. The Wiser also shown, again, can see on the phone what is going on. And in both cases, the hubs also show which is calling for heat , both Nest and Drayton wiser have lights on the hub, so show which is asking the boiler to run, I would think you have the same?

A stuck micro-switch on a motorised valve can cause the boiler to run when nothing switched on, but all this will do, is cause the boiler to switch on/off all the time, as the TRV heads should stop any overheating.

 

[Ian H]

I swapped the batteries but there is no change.

I'll get a longer ethernet cable to get the Gateway nearer and see if I can get the heating on with that.

Something else I just thought, the night the house was massively hot, my Son had fixed the thermostat onto the wall with a double sided velcro tape. It's been sat on the worktop for 8 years before that. He put it above a 3 way light switch and the wires come down from the ceiling. Could be a coincidence but seems strange.

 

[CountryFan]

If you don’t use the Gateway then I wouldn’t plug it in. If the light switch is generating some heat then it certainly can affect the temperature. Temperature shouldn’t be overshooting on these. If the boiler has a 1 in the right hand window of the display then it’s at temperature. Lost pressure recently?

 

[Ian H]

Yes, I have had to top it up a couple of times since we started using the heating.

 

[CountryFan]

Yes, I have had to top it up a couple of times since we started using the heating.

The vent on the left hand side of the boiler at the top might just need the air taking out. Do you currently have heating?