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Need wiring help for control board

Elderly man replaced furnace motor but did not mark where the wiring harness wires go. Can you tell me what the orange and black wires go on the board?

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  • Brad Brown Apr 08, 2015

    What is the make and model of the furnace?

  • Diane S
    Diane S Apr 08, 2015

    Xenon model XF801155A with control by White-Rodgers 50T55-288. Only furnace still operates, a/c died few years back. Have motor brown wires going to capacitor, the blue wire goes to heat (should be medium speed). The yellow wire goes to CIR N (neutral maybe). two wires are parked (red and orange) which should be low and med-low speeds. The black wire he can not remember where it went- I suspect it went to cool but he said no.

  • Diane S
    Diane S Apr 08, 2015

    If the black wire is for cool (which the diagram I found indicates black is high speed, then he may not need that connected to anything.

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  • 39 Answers

Black is hi speed cool and orange is low speed heat

Posted on Apr 09, 2015

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Posted on Jan 02, 2017

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SOURCE: replacing the thermostat, took the

the normal wiring for stats is white=w=heat,red=r=24volts,green=g=fan,blue=c=common,yellow=y=cooling.
see what ties into your furnace board and match the terminals.

Posted on Aug 12, 2008

  • 1214 Answers

SOURCE: Wiring a retrofit soft start blower into a Ruud 5T/100k gas pack

Chances are, you've smoked the motor. You basically put 120 volts across the speed windings of the motor when you did this.

What you need to do is, with the new motor, you will have neutral, and speed 1, speed 2, speed 3, etc. Hook one of the original black wires to neutral (it would be best to trace which of the two black wires is connected to neutral, and connect this one.).

Black on the new motor is probably High speed, red is probably low, orange is medium speed. Hook the remaining black wire to one of these, and no more than one of these, or you will smoke the motor again.

Attach a wire cap and/or electrical tape to the remaining wires to insulate them from contacting anything else.


Posted on Jan 27, 2009

  • 587 Answers

SOURCE: connecting a motor starting capacitor

New Capacitor

herm start on the compressor
fan start on fan motor
c run or power to both compressor and fan

Posted on Apr 25, 2009

  • 59 Answers

SOURCE: need som help with a

Look at the schematic on the inside panel of the cover you removed. It should have the schematic with the wires and colors labeled as to what goes where. The wires are a common, run and start wire. They schematic should identify the wire by color and motor connection by number. You should be able to see the numbers on the motor by the connection. hope this helps.

Posted on Jan 29, 2011

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I have a Lennox Diplomat furnace. How can I tell if the blower motor is set for high speed when it comes on?


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You could have different colors but they will be close. If it's an aftermarket motor, the speeds will be listed on the motor itself, but very difficult to get to sometimes. On the board, you should have terminals marked, COOL, HEAT, PARK, PARK. You hook what speed you want for Cool and Heat and put the other 1 or 2 wires on Park.

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The F11 error code indicates a serial communication problem between the central control board and the motor control board. This can be caused by:

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1 Answer

My machine wach but do not spin a the end.


Note: This solution is intended only for asker qualityisc as per Live Chat session discussion. Error code reads E47 which means the Control board thinks the PTC circuit (wax motor) is open.

Unplug the machine then remove the spring-loaded wire loop that holds in place the front of the bellows over the lip of the door opening in the front panel.
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Using needle nose pliers, start where the spring and wire are connected at the bottom of the bellows and pull the wire out of the groove of the bellows then pull the bellows off of the lip of the front panel.
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Remove the screws securing the door lock and switch assembly to the front panel. Once the screws are removed, lift the door lock and switch assembly then pull it away from the front panel.
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Take the door lock and switch assembly out of the machine and disconnect the electrical connections.

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Measure the resistance of the wax motor. The normal resistance is around 1500 ohms. Shorted or open circuit wax motor means the door lock and switch assembly needs to be replaced.
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Simply
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Remove the top panel to access the control board if further continuity test is necessary or if the red/black wire of the wax motor harness has continuity with the all other red/black wires of the door lock and switch assembly harness.

Remove the screws attaching the top panel to the rear of the cabinet then lift the panel off. The console can be removed from the cabinet to completely access the control board connections, particularly the door lock and switch assembly harness connections. Check the continuity of the red/black wires at the door lock and switch assembly to the red/black wire of the harness connected to connector J2 on the control board.
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The problem is in the control board if the wax motor is good and the door lock and switch assembly wire harness has all the necessary continuity. The only viable solution, should that be the case, is the replacement of the control board.

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It sounds like you have a bad motor speed. So try this:

With Power Still Off, on the same control board there is a terminal usually marked Cool and Heat. There should also be a couple of terminals that are named park. The wires hooked to these are the fan wires..

Exchange the Heat and Cool wires on the terminal board. Put everything back together and try cooling again, if the fan comes on
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