Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: HVAC Schematics | |||
1 | Did you review the Air Delivery Description and Operation and the Air Temperature Description and Operation and perform the necessary inspections? | Go to Step 2 | |
2 | Operate the blower motor at each speed. Does the blower motor stop in the OFF position? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Disconnect the blower switch connector. Does the blower motor stop? | Go to Step 7 | Go to Step 4 |
4 | Disconnect the blower motor resistor connector. Does the blower motor stop? | Go to Step 6 | Go to Step 5 |
5 | Repair the short to ground in the blower High speed circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 8 | -- |
6 | Repair the short to ground the blower Low, Medium 1 or Medium 2 speed circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 8 | -- |
7 | Replace the blower switch. Refer to Blower Switch Replacement . Did you complete the replacement? | Go to Step 8 | -- |
8 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
