Step | Action | Yes | No | ||||||
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DEFINITION: The low and the high side pressures are both higher than normal.
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1 | Were you sent here from the air conditioning (A/C) System Performance Test? | Go to Step 2 | |||||||
2 |
Are the cooling fans ON and operating properly? | Go to Step 3 | Go to Step 5 | ||||||
3 | Visually inspect for the following conditions:
Do any of these conditions exist? | Go to Step 4 | Go to Step 6 | ||||||
4 | Repair the air flow restriction. Is the action complete? | Go to Step 9 | -- | ||||||
5 | Repair the fault to the cooling fan operation fault. Refer to Cooling Fan Inoperative in Engine Cooling. Is the action complete? | Go to Step 9 | -- | ||||||
6 |
Caution: Avoid contact with moving parts and hot surfaces while working around a running engine in order to prevent physical injury. Feel the liquid line on both sides of the expansion device. Are the temperatures on both side of the expansion device similar? | Go to Step 7 | Go to Step 8 | ||||||
7 | Replace the damaged or faulty expansion devise. Refer to Expansion (Orifice) Tube Replacement . Is the action complete? | Go to Step 9 | -- | ||||||
8 |
Is the action complete? | Go to Step 9 | -- | ||||||
9 |
Are the readings within the specified ranges listed in the A/C Performance Chart? | ||||||||
10 | Operate the system in order to verify the repair. Did you find and correct the condition? | System OK | Go to Symptoms - HVAC Systems - Manual in HVAC Systems - Manual or Go to Symptoms - HVAC Systems - Automatic in HVAC Systems - Automatic |