Has the HVAC Blower Controls System Check been performed?

--

Go to Step 2

Go to HVAC Blower Controls System Check

1. Remove the auxiliary blower motor relays.
2. Listen for the blower motor to shut off after removing each relay.

Does the auxiliary blower motor stop running?

--

Go to Step 3

Go to Step 4

Replace the auxiliary blower motor relay that you last removed. Refer to Auxiliary Blower Motor Relay Replacement .

Is the repair complete?

--

Go to HVAC Blower Controls System Check

--

Connect a J 39200 (volts) between cavity 4 of the high relay socket and ground.

Is voltage greater than the value given?

1 volt

Go to Step 5

Go to HVAC Blower Controls System Check

Locate and repair the short to voltage in CKT 1172 (YEL) between the auxiliary blower motor, the auxiliary blower motor relay, high and the auxiliary blower resistor. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to HVAC Blower Controls System Check

--