Step | Action | Yes | No |
---|---|---|---|
1 | Verify the customer's complaint. Are the customer's concerns verified? | Go to Step 2 | System OK |
2 |
Is the blower noise constant at high blower speeds or certain modes, but absent at lower speeds or in other modes? | Go to Step 11 | Go to Step 3 |
3 | Inspect for vibrations from the blower motor and fan assembly at each blower speed by feeling the blower motor housing. Did you find excessive vibration? | Go to Step 6 | Go to Step 4 |
4 |
Do you find any foreign material at the blower inlet? | Go to Step 5 | Go to Step 6 |
5 | Remove all foreign material. Is the repair complete? | System OK | Go to Step 6 |
6 |
Did you find any problem? | Go to Step 7 | Go to Step 9 |
7 | Lubricate the motor. Is the repair complete? | System OK | Go to Step 8 |
8 | Replace the motor and the fan assembly. Is the repair complete? | System OK | Go to Step 9 |
9 | If the noise is a click, tick or whine, replace the motor. Is the repair complete? | System OK | Go to Step 10 |
10 | Reinstall the original motor. Is the problem still present? | Go to Step 11 | System OK |
11 |
Is the noise present in the defrost mode only? | Go to Step 12 | Go to Step 13 |
12 |
Is the repair complete? | System OK | -- |
13 | Is the noise present in the floor mode only? | Go to Step 12 | Go to Step 14 |
14 | Is the noise present in the vent mode only? | Go to Step 15 | Go to Step 16 |
15 |
Is the repair complete? | System OK | -- |
16 | Is the noise present in all modes, but not all temperature positions? | Go to Step 17 | Go to Step 18 |
17 |
Is the repair complete? | System OK | -- |
18 |
Is the repair complete? | System OK | Go to Step 2 |