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Step | Action | Yes | No | ||||||
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DEFINITION: Noise originating from the blower motor. | |||||||||
1 | Were you sent here from Symptoms or another diagnostic table? | Go to Step 2 | Go to Symptoms - HVAC Systems - Manual or Symptoms - HVAC Systems - Automatic | ||||||
2 | Inspect the air inlet grille for debris. Is debris present? | Go to Step 8 | Go to Step 3 | ||||||
3 |
Is a noise evident during the blower operation? | Go to Step 4 | Go to Step 11 | ||||||
4 | Inspect for excessive vibration at each blower motor speed by feeling the blower case. Is excess vibration present? | Go to Step 6 | Go to Step 5 | ||||||
5 | Listen to the blower motor at each speed. Is the blower motor making a squeaking or chirping noise? | Go to Step 9 | Go to Step 11 | ||||||
6 |
Did you find any foreign material on the blower motor or blower motor impeller? | Go to Step 8 | Go to Step 7 | ||||||
7 | Inspect the blower motor for the following conditions:
Did you find any of these conditions? | Go to Step 9 | Go to Step 10 | ||||||
8 | Remove the foreign material. Is the action complete? | Go to Step 10 | -- | ||||||
9 | Replace the blower motor. Refer to Blower Motor Replacement : Right Hand Drive → Left Hand Drive . Is the repair complete? | Go to Step 11 | -- | ||||||
10 | Install the blower motor. Refer to Blower Motor Replacement : Right Hand Drive → Left Hand Drive . Is the action complete? | Go to Step 11 | -- | ||||||
11 | Operate the system in order to verify the repair. Did you find and correct the condition? | System OK | Go to Step 2 |
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