- Location
- Somewhere wet & hilly in NW England.
Any heating experts please?
CH system - oil fired.
Thermostat is Honeywell DT90E - keeps firing even though actual temperature on Stat is above the required temperature setting.
It's been doing this for some time so I checked the installer settings and these were not correct so I reset the following:
On/off from 1 to 4
Cycle rate from 6 to 3
Pb from 1.5 to 2
For a week or so it has been working fine (within 0.5C of desired setting) but now it is overshooting again. Grrrr.
Replaced batteries (just in case) and no difference noted.
The unit is not very old btw.
Any advice appreciated.
CH system - oil fired.
Thermostat is Honeywell DT90E - keeps firing even though actual temperature on Stat is above the required temperature setting.
It's been doing this for some time so I checked the installer settings and these were not correct so I reset the following:
On/off from 1 to 4
Cycle rate from 6 to 3
Pb from 1.5 to 2
For a week or so it has been working fine (within 0.5C of desired setting) but now it is overshooting again. Grrrr.
Replaced batteries (just in case) and no difference noted.
The unit is not very old btw.
Any advice appreciated.