Just replaced the circuit board after a technician told me that was the problem. White Rodgers 50A56-956. Getting the same result as the old board: clicks on, shuts off

I agree that it sounds like a circuit board problem. So far as I'm aware, shutting off the power and turning it back on should cause the furnace to reset.


But wait and get some additional opinions on this oddball symptom would be my suggestion.
Thanks guys! The Thermostat is applying power. Both limit switches OK. The 2 microswitches attached to the air pressure lines are OK except one stays closed & one open sensing fan air I guess. Zero voltage read between green & white 120VAC input wires. I don't know what else to check. The darn circuit board will not reset and LED gives 2 flashes for lockout, and it means TOTAL LOCKOUT. Could you guys give me an idea how to go about buying a board to try? The only place near me just about doubles the price unless you are a HVAC company. Do I need to replace the part of the board that says "White-Rodgers" on it or just the green circuit board. Thanks again for helping.
Checked for thermostat voltage to Red & W1, checked limit switches, checked for 0 volts between green & white line input voltage, checked for loose connections. Red LED continues to flash 2 times after power recycled for reset.
Gas valve & igniter receive no power. I don't know what else to check. Does anyone have any more ideas to prove circuit board is bad?


My Trane furnace model is XV80, model # TUD100R9V5H6. If circuit board, do I replace the white box labeled "White-Rodgers, Model 50A51-507" or just the small green circuit board labeled "American Standard 21C148501P01?


I appreciate any more help you could give me including where to buy the board.
Thanks! Mickey

If it turns on every night at 9:30 pm it is programmed.

Does the display seem a little dim? If so replace the batteries. Anything else may be a furnace issue not the thermostat. Look at the furnace and see if you can view any error codes on the circuit board

Hi. This is Aaron Moratalla from White Rodgers. See this link for the copy of manual. http://www.emersonclimate.com/Documents/White-Rodgers/instruction_sheets/0037-6841.pdf

Wiring connections are on page 7. If you need more help don't hesitate to call Tech Support at 800-284-2925. Thank you for choosing White Rodgers.

we are not white rodgers /emerson --the following links can assist you but if the trooble shooting doesnt fix problem just replace the stat
White Rodgers White Rodgers White Rodgers Thermostats Thermostat AC Wholesalers How to Troubleshoot White Rodgers Thermostat eHow

Try replacing the battery if you haven't already done so. *Disclaimer: I am not a lawyer, despite the handle. Words to live by: "Every creative act results from a sudden cessation of stupidity." -Edwin H. Land, inventor of the Polaroid Land Camera "The problem can always be solved with the materials in the room." -My college Physics Lab

Download a PDF version of the Operating Manual HERE. ___ *Disclaimer: I am not a lawyer, despite the handle. Words to live by: "Every creative act results from a sudden cessation of stupidity." -Edwin H. Land, inventor of the Polaroid Land Camera "The problem can always be solved with the materials in the room." -My college Physics Lab Professor

I had the exact same problem. Even pressing the Hold button does not really help, because once it resets - the Hold temperature also changes to the default.

I fixed this by replacing the 470 micro-Farad / 10v capacitor in the unit (it's the grey-colored capacitor). To access the back of the circuit board, you will need to break 2 plastic rivets holding the front of the unit to the base.

After replacing the capacitor I've not had any resets for the past 3 days (it used to reset itself every couple of hours).

Hope this helps.

Noel

My name is Tim Burke from White-Rodgers. If you hear the "click" the thermostat is calling. It would appear that their is a wiring issue to the funace. Please contact our customer service toll free hot line and they will be happy to walk you thru it and assist you. 877-978-7828

Regards,
Tim
[email protected]
Tim

The W- terminal is for the HEAT RELAY.
Connect the brown and white wire to the WB terminal which is heat relay of the Hunter thermostat.