Furnace blower problems.. Capacitors?

You are correct:

If the motor is running in heat mode, there is nothing wrong with the motor's capacitor.

This motor is a PSC motor and does not operate on a start capacitor, only a run capacitor.

So you have tested the motor by jumping it out with voltage and it works, so you have eliminated the motor as a possible problem (assuming you tested both speeds when you jumped out the motor).

Usually, a unit will have a fan relay switch for the operation of the fan in "fan on mode" , as well as "cool mode".

Also some units have this relay built-in the board.

The best way to determine if the relay is a separate unit or not is to:

Look inside the air handler for the green low voltage wire coming into the unit from the thermostat G terminal.

Then trace the wire to where it terminates.

If the wire goes to a black box looking relay, or a stack looking relay, that would be the fan relay (you will need to replace it).

If the green wire terminates at the board you will have to replace the board.

Troubleshooting Furnace Blower

If there are no brown wires coming from the motor there is not a capacitor. If you were able to bypass the fan control board then thats the problem...

Good work troubleshooting. When you go back with it, the black wire goes on the cooling spade, the red wire goes on the heat.

Capacitor problems are hassle-free, and that they are particularly hassle-free to change. two hundred money seems fairly intense for purely changing a capacitor, often an entire motor is not any greater desirable than that... i can get capacitors at my wholesaler for approximately 20 money, so which you will possibly be able to assume to pay 40 or 50, and the exertions time to place in it would purely be a jiffy. As for the different stuff he's telling you, he's purely attempting to make funds. The blower cleansing could be needed if its real grimy yet different than that don't enable him sell you a million different centers.

Its the board. Get the model and serial number and order one. Install the wires, on the new board, just like you took them off.It will save you about 300.00 doing it yourself.