Replacing trane control board

Sounds like a wiring or control board problem. Have an HVAC tech come look at it for best results.

Hi,
The control goes in the door...it is easy to get to.
Just take the screws out of the inside panel of the door, they are around the outside edge of the interior of the door. The panel will then lift off and the control will be near the top on the inside.
Make sure the power is turned off to the dishwasher and then one by one remove the wires from the old board and place them on the new board. then remove the old board and fasten in the new one. replace the panel and then give it a trial run.
Everything should be working just fine but some of the timing will be a bit different.

heatman101

Hello The easy way to bring the blower on for heating is if the thermostat has an ELECTRIC heat function or selector switch.That will bring on FAN during a call for heat.The aquastat won't be used.

Was the board exactly the same as the one you took off? Even if it was go back and check your wiring. That would be the first place to look since the board was all that was changed.

trane used dc t-stat for a while with a sensor in line.It was designed to run off of the sensor in the event that the t-stat failed.If your model is like that get a dc-ac converter board and you can use any 24vac t-stat.Will take alot of problems away because the dc will pick up residual current if using unshielded wiring.

For Trane sytems, B is your "Common" wire. O is your reversing valve relay, G is your fan, Y is your compressor contactor, R is Hot, Brown will not be used on your electronic tstat. X2 is your backup electric heaters. Without knowing what terminals are on your new tstat, I cannot offer more information than this. The installation manual may indicate what each terminal is controlling. I strongly suggest to write down ALL of the terminals and colors from your old t-stat and be sure to turn off the power to your air handler. Put the fan switch on your tstat to ON before turning off the power. Make sure the fan is running. Then turn the power off to your Air Handler. If your fan stops running, you have turned the power off to your tstat and are ready to start replacing it with your new tstat. I hope you find this helpful. Good Luck!!!

Yes, you will want to put the unit into cooling mode to help assistance with the ice melt.

If you can, block off the outdoor coil or disconnect the outdoor fan motor. This will assist in raising the discharge pressure and temperature and thus, it will melt the ice quicker.


Or, if you have the capability, you can take a garden hose around to the unit hooked into hot water and melt the ice that way.




If your control board is messed up, why aren't you replacing it?

Once you have installed the jumper, you will need to kill power to the furnace for about a minute to reset the board. Make sure the the jumper is making good contact. Sometimes they appear to be plugged in but still are not making contact.

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Please note. Not all installers use the proper color codes when they install or replace equipment. It may be necessary go go to the furnace or outdoor unit to verify what wires are for what purpose. Also be sure there are no splices in the wire that could change the wire colors between components.

• R (red) or Rh (Red heat) 24 volts from equipment.
• Rc (Red cooling) 24 volts from transformer in cooling equipment.

Note: If only furnace has a transformer and cooling equipment does not jumper Rc and Rh.

• W (White) sends 24 volts to furnace control to start the heating cycle.
• W2 (no standardized wire color, usually whatever wire color is available) controls second stage heat.

Note: W2 is most often used for heat pumps to control what is called emegency heat or Auxillary heat, and most often will use the white wire.

• Y (yellow) often (blue) is used, controls cooling unit (outdoor condensing unit) also is used for heat pump heat.
• Y2 (no standardized wire color, usually whatever wire color is available) controls second stage cooling.
• G (Green) controls the fan "on" operation of the furnace/air handler. Also often is used to start the blower for many electric furnaces.
• C (common) most often brown but can also be black or other color available to installer.
• O (orange) Energizes heat pump reversing valve for cooling (Trane and most other brands).
• B (Blue) Energizes heat pump reversing valve for heating (Rheem, Ruud and Weatherking).

You need to replace your control board, but if you are can repair it by your self you can change the relay that supply the fan and condenser.