SOURCE: honeywell rth230b won't shut off heat
Sounds like a relay sticking. Possibly in the thermostat or possibly the furnace relay at the furnace. The next time it happens, unplug the thermostat from the wall. If the furnace still runs then it's the furnace relay.
Hope that helps...
Geno
SOURCE: I just purchased a house with brand new furnace
?? Connect Wires 5. Labels don't match? If a wire does not match any terminal on the thermostat, see next page. Quick Installation Guide 6 Alternate Wiring If a labeled wire does not match any terminal designation, see diagram below. Do not use C, C1 or X wire. Do not use B wire if you already have O wire. Wrap bare end of wire with electrical tape. This thermostat cannot be used if your old thermostat had any two of the following wires: R, RC, RH, 4 and V. Place a jumper (piece of wire) between Y and W if you have a heat pump without auxiliary/back-up heat. ?? Connect Wires (cont'd) Programmable Thermostat RTH2300 7 Set jumper JP1, on the back of the thermostat, if you have connected a wire to the G terminal. Incorrect jumper setting: An incorrect setting is noticeable in a gas or oil heating system. When heating starts, you will initially feel cold air coming out of the vents as the fan is running before the furnace has enough time to heat up the air. ?? Set Heating Fan Control 6. HG Leave the jumper in this factory-set position if you have a gas or oil furnace. HE Place the jumper to this position if you have an electric furnace. JP1 Quick Installation Guide 8 Set jumper JP2, on the back of the thermostat, if you have a heat pump. Incorrect jumper setting: The heat pump operation will be reversed, i.e., it will cool in Heat mode and will heat in Cool mode. ?? Set Heat Pump Reversing Valve 7. O Leave the jumper in this factory-set position if you have connected O wire to the O/B terminal. B Place the jumper to this position if you have connected B wire to the O/B terminal. JP2 Programmable Thermostat RTH2300 9 1) Install 2 AAA batteries on the back of the thermostat. 2) Align the two brackets on the top of the thermostat with the corresponding slots on the top of the wallplate. 3) Push the thermostat against the wallplate. 4) Tighten the screw at the bottom of the thermostat. 5) Turn power back on at the heating/ cooling system.
SOURCE: My furnace works intermittently.
You may have a dirty flame sensor. There are a number of other possible causes as well. Rheem/Ruud/Weatherking furnaces also have problems with the connection on the blower deck.
The flame sensor sometimes must be bypassed around the MOLEX CONNECTOR in the deck due to humidity.
Hope this helps.
Matt
[email protected]
SOURCE: switching thermostat from farenheit to celsius
My thermostat was set on celsius and couldn't get it to change back to fahrenheit. My son suggested pressing both up and down arrow buttons at the same time and it worked. It changed back to fahrenheit.
SOURCE: problem with thermostat (honeywell rth111/221).
should be installed with
1) red to rc and jumpered to rh
2) green to g
3) yellow or blue to y
4) white to w
to test: remove t-stat connect white and red - furnace should operate normally unitil you disconnect.
if it does replace t-stat
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