Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: HVAC Schematics DEFINITION: The blower motor is ON while the HVAC controls in the OFF position. | ||||
1 | Did you perform the HVAC Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Does the blower motor operate? | -- | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
3 | With the scan tool observe the Commanded Blower parameter in the Heating and Air Conditioning data list. Does the scan tool indicate that the Commanded Blower parameter is at the specified value? | 0% | Go to Step 4 | Go to Step 6 |
4 | Disconnect the HVAC control processor. Does the blower motor continue to operate? | -- | Go to Step 5 | Go to Step 6 |
5 | Inspect for poor connections at the harness connector of the blower motor. Refer to Wiring Repairs and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 9 | Go to Step 7 |
6 | Inspect for poor connections at the harness connector of the HVAC control processor. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 9 | Go to Step 8 |
7 | Replace the blower motor . Refer to Blower Motor Replacement . Did you complete the replacement? | -- | Go to Step 9 | -- |
8 | Replace the HVAC control processor . Refer to HVAC Control Processor Replacement . Did you complete the replacement? | -- | Go to Step 9 | -- |
9 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
