Thermostat replacement... any point?

[dishman]

Hello,

I have an old Satchwell dial thermostat, the bi-metallic strip kind. It works, however, in an attempt to be as efficient as possible I was testing how accurate it is in operation, and it seems that it has a very large operating window at a given temperature.

If the heating is on, and there is a room temperature of around 19-20 degrees, the thermostat does not seem to de-activate the pump until I manually turn it below 15 degrees. I have never actually noticed it de-activate the pump itself. It always seems to need a manual nudge.

So, my question: Is it worth just replacing it with a new dial thermostat.

http://www.plumbcenter.co.uk/en/hea...4360b-1015-room-thermostat-240-v-16-amp-15725

Or, by their very design are they all inaccurate to the same degree?

I am also considering a basic digital thermostat but need to work out the wiring.

http://www.honeywelluk.com/products/Thermostats/Room-Thermostats/Wired-Thermostats/DT90E/

But do not want to splash out too much as am renovating next year...so it all depends on how much of a saving it may give me (if any at all) due to grater accuracy.

 

[Dan Robinson]

DT90e all the way.

 

[gas112]

agree with dan dt 90 best stat out there for the money

 

[Dean744PiN5]

stopped fitting Dt90's , not because they aren't good but people just couldn't get their head around it showing actual temperature, even though i clearly explain it