I installed a Honeywell CT87A 4447 thermostat this summer. It worked fine with my air conditioning, but I am having a problem with it controlling my furnace. It will turn the furnace on and I can turn the fan on manually, but when set to auto the fan does not come on. The thermostat has the...

I know there have been multiple posts regarding this stat. I've collected them and have them as reference. I was hoping to do this right the first time rather than have to troubleshoot. The RTH230B is replacing an older Honeywell mercury stat that has 4 wires: W1-white G- green Rh-red...

I installed the Honeywell RTH230B in the fall and just switched to air except it only blows out hot air. I have a five wire set up but don't know where to put the extra blue wire. It is not displayed in the setup. Actually I just noticed there are for additional wires, blue, black, brown and...

I live in a home that was built back in the 1960s. I am thinking this furnace is probably the original (LOL) My wife and I decided to re-texture and repaint the walls in our living room just two weekends ago. After painting the walls white, that gold colored thermostat stood out like a soar...

I recently installed Honeywell #RTH230B thermostat to replace and old Honeywell # T87F( old round non digitital type). I have oil burner with basebaord water heat. Since my olf thermostat was 2 wire only and I have no AC I pulled the jumper wire between Rh and Rc as per the instructions. Thj9is...