HVAC Questions? Ask an HVAC Expert for Answers ASAP
YES, still waiting.
Unit is working but only allowing us to have it on for an hour at a time by pressing the "extra hour " button. Ititially it switched the boiler off. When the hour is up it will switch the boiler off again and we will have to press "extra hour again to get it to switch the boiler on again.
We have already looked at this and the 9400 needs a PIN code to reset it and ours does not have a facility to do this ! We have already dowloaded and printed out that manual and it does not help ! There must be a way to reset the ST6400C and this is what we want to know !