Room thermostat - faulty ?

[Rollerball]

I think that my boiler's room thermostat might be faulty - the oil-fired
boiler is in a cupboard off the utility room and the thermostat is in
the hall.

Noticed about a week ago that the radiators were only warm when the
thermostat was turned up to about 20. Turned it up to 25
and all was well.

Today the same thing happened again, but turning it up to 27 has got
the radiators hot again.

Now it's definitely not my imagination, ie it IS getting colder in the
house when it should be warm, ie it's not just me imagining it's
colder!

So is the thermostat at fault?

It's an old 'Lifestyle' thermostat with a square surround and a round
dial.

Could I perhaps repair/service it myself? Or is it a job for a
plumber?

Or could I replace it? Or is that too a job for a plumber?

Thanks

 

[stevedarby]

Is the boiler thermostat is set to high?

The room thermostat may be out of calibration.

 

[Rollerball]

Is the boiler thermostat is set to high?

I'm not sure. It hasn't been changed in the last five years so perhaps not?

The room thermostat may be out of calibration.

How do I recalibrate it?

 

[stevedarby]

Boiloer stat if fault has just happened is probably fine then. You cannot, you need a new room stat.

 

[Rollerball]

Okay, thanks.

I'm pretty handy with DIY things, is it easy to fit a thermostat?

Is it a simply 'remove old, wire in new' job?

Or is it best left to a plumber?

 

[homes]

It is getting very cold outside, and this more than likely is your problem. Your normal thermostat setting is insufficent to heat the house.

 

[Rollerball]

It is getting very cold outside, and this more than likely is your problem. Your normal thermostat setting is insufficent to heat the house.

That was my first thought but it was colder yesterday and working fine, but less cold today and not heating so well until I turned it up.

The heaters are usually hot and you can't touch them for too long, but this afternoon they were only warm even though the thermostat hadn't been adjusted and the rooms were definitely cooler. Turning up the thermostat sorted the problem. For now ......... but as noted it's done this before, each time needing a higher setting.

 

[Whitespirit66]

It is getting very cold outside, and this more than likely is your problem. Your normal thermostat setting is insufficent to heat the house.

This doesn't make any sense. If you set your stat to 20 degrees and leave your heating turned on all year, then the house should be at 20 degrees whether its 10 below outside or a heat wave.

Whatever your stat is set at during the winter, the boiler should stay on longer and work harder to maintain the set temp if the outside temp starts dropping.

New room stat methinks.

 

[Rollerball]

Is a room thermostat easy to replace?

It is just a case of turning off the power, removing the old and wiring in the new, or is there more to it than that?

 

[Whitespirit66]

If you're handy with DIY, shouldn't be any problem. If you have a digi. camera, a pic of the stat, and perhaps the wiring inside will help us tell you what you need. Or, take the old stat down to your friendly local plumber's merchants and ask for the new equivalent.

 

[Rollerball]

Thanks.

Just out of interest I took some pics, one of the outside of the thermostat, the other with the cover removed:

http://i59.photobucket.com/albums/g319/Dalek99999/Outside.jpg

http://i59.photobucket.com/albums/g319/Dalek99999/Inside.jpg

 

[Whitespirit66]

One of these will do you.

http://www.uk-plumbing.com/Honeywell-T6360B-1028-Room-Thermostat-240V-10A-p-1321.html

or any 3 wire (plus earth makes four - as in yours) 240V room stat.

 

[Rollerball]

Excellent, many thanks.

So it's just a case of turning off the mains power, removing the old and wiring in the new stat and that's it?

 

[Whitespirit66]

Yes, job done. Post again if you need help with installation.

 

[Rollerball]

Will do, cheers!