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I have a Carrier Debonair 220 thermostat and the display is completely blank, so nothing can be set. Is there a way to reset, or a reason why there is nothing displayed?
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The t-stat needs a common and a hot. I know that is simple but it doesn't hurt to ask. Do you have the 24 volts needed to operate the t-stat? If you have 18 volts that may affect the lights.
homeappliance.manualsonline.com > ... > Carrier Thermostat Appliance manuals and free pdf instructions. Find the user ... Carrier 33CS450-01 Thermostat User Manual. Page 1 ... Carrier Corporation 04/06. Use with most ...
Does it have a battery backup in the unit? If so replace them. If its an older model used frequently oil from your hands gets behind the buttons which causes intermittent connections and can cause display error. Remove the unit, carefully open it up and clean all contact surfaces with q-tip and a bit of rubbing alcohol. May solve your problem. While your at it make sure all wire connections are tight. Mark all wire locations during disassembly to make sure they go back in the right place.
Hello my name is Willie of GMP mechanical services out of Centreville Virginia. I need some more Information about your AC unit is electric or gas heat. Is there a fault or fail signal in the digital display anywhere?
The stat that works is called the main and the other two are called slave stats. The stats must be set to heat or cool the same as the main. If you want one room to cool and one to heat , sorry. Need to upgrade to auto changeover. Is this AC actally a Heat pump?
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