Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: HVAC Schematics DEFINITION: The auxiliary blower motor is ON with the auxiliary blower motor switch in the OFF position. | |||
1 | Did you perform the HVAC Diagnostic System Check? | Go to Step 2 | |
2 |
Does the auxiliary blower motor turn OFF? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 |
Does the auxiliary blower motor continue to operate? | Go to Step 4 | Go to Step 5 |
4 |
Does the auxiliary blower motor continue to operate? | Go to Step 6 | Go to Step 7 |
5 | Test the low, medium 1 and medium 2 blower motor control circuits for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 7 |
6 | Test the high speed blower motor control circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 8 |
7 | Inspect for poor connections at the harness connector of the auxiliary blower motor switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 9 |
8 | Inspect for poor connections at the harness connector of the HVAC control processor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 10 |
9 | Replace the auxiliary blower motor switch. Refer to Auxiliary Blower Motor Switch Replacement . Did you complete the replacement? | Go to Step 11 | -- |
10 | Replace the HVAC control processor. Refer to HVAC Control Processor Replacement . Did you complete the replacement? | Go to Step 11 | -- |
11 | Operate the system in order to verify the repair. Did you correct the condition? | -- | Go to Step 2 |
