Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | With mode selector in the ON position and the blower switch in the medium high position, test the blower switch medium-2 circuit at the blower resistor for continuity to ground. Refer to Circuit Testing in Wiring Systems. Is ground present? | -- | Go to Step 2 | Go to Step 3 |
2 | Replace the blower resistor. Refer to Blower Motor Resistor Replacement in HVAC. Is repair complete? | -- | System OK | -- |
3 | Test the blower switch medium-2 circuit at the HVAC control assembly. Refer to Circuit Testing in Wiring Systems. Is ground present? | -- | Go to Step 4 | Go to Step 5 |
4 | Repair open in the blower switch medium-2 circuit. Refer to Wiring Repairs in Wiring Systems. Is repair complete? | -- | System OK | -- |
5 | Test the ground circuit at the HVAC control assembly. Refer to Circuit Testing in Wiring Systems. Is ground present? | -- | Go to Step 6 | Go to Step 7 |
6 | Replace the HVAC control assembly. Refer to Control Assembly Replacement in HVAC. Is repair complete? | -- | System OK | -- |
7 | Repair open ground circuit. Refer to Wiring Repairs in Wiring Systems Is ground present? | -- | System OK | -- |
