Honeywell thermostat shows Fail on display

[BigBadBarry]

Hi.

Hoping someone can help - just moving into a new house and the thermostat seems to have packed up - I'm not sure.

It is a Honeywell and I think it is the DT90E.

On the digital display, where the temperature normally shows, it just says FAil. None of the buttons respond when pressed. It has been fine until today and it hasn't been touched at all.

On the basis of an old thread here, I have put brand new batteries in, but it's just the same. Does anyone know what the cause/solution might be?

Thanks.

 

[Dan Robinson]

You need to get yourself a new one. You can get just the room unit as a spare part.

 

[BigBadBarry]

Thanks. Is that the only solution? The building firm who put the house up are telling me to check the pressure gauge on the boiler and seem to think this is a case of me not knowing how to work the system. Is it possible it's something which I could fix if I knew what to do?