Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: HVAC Schematics DEFINITION: The auxiliary blower motor operates in at least one, but not all, speed position. | |||
1 | Did you perform the HVAC Diagnostic System Check? | Go to Step 2 | |
2 |
Does the auxiliary blower motor operate properly in each speed position? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 |
Does the test lamp illuminate for each speed position selected? | Go to Step 5 | Go to Step 4 |
4 | Test the suspected auxiliary blower motor control circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 6 |
5 | Inspect for poor connections at the harness connector of the auxiliary blower motor resistor assembly. 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 9 | Go to Step 7 |
6 | 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 9 | Go to Step 8 |
7 | Replace the auxiliary blower motor resistor assembly. Refer to Auxiliary Blower Motor Resistor Assembly Replacement in Heating, Ventilation and Air Conditioning. Did you complete the replacement? | Go to Step 9 | -- |
8 | Replace the auxiliary blower motor switch. Refer to Auxiliary Blower Motor 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? | -- | Go to Step 2 |
