Troubleshoot the AC in your 1991 Chevy Motor lorry this summer.
Problems that may occur with the air conditioning of your 1991 Chevy Motor lorry are normally easy to diagnose, if it's an point with a leaky AC hose or a poor Attractive clutch. Dart on ice a sporadic basic troubleshooting steps before bewitching your Chevy in to an AC mechanic for what could turn outside to be an expensive servicing.
Instructions
1. Originate the engine and switch on the electric blower fan and AC to ice the AC controls are operating equitable. Provided the controls are loose or gargantuan to alteration, carry them replaced. Whether the fan does not turn on, a fuse may keep blown, or the fan itself could be defective.
2. Look the fuse box for any blown or damaged fuses. The fuse panel (depending on the representation of Motor lorry) is normally located under the dashboard on the left side of the steering circle. Consult the diagram on the inside of the fuse box contain for directions on analyze the fuse in agreement to the AC transaction. Provided the fuse is broken, interchange it with another of the exact twin amperage grading.
3. The test gauge has a red pressure monitor and a blue monitor from which to read the pressure. If the reading is not between 50 and 80 psi it could indicate a leak within the system. Have a qualified mechanic investigate further for you. On the contrary, one should be cooler than the other. Provided it is not, it could indicate that the valve ascendancy is malicious. Acquire a expert mechanic investigate this further, as the valve control may need to be replaced.
4. Turn the AC up to the highest setting (with the engine running) and check under the hood to see if the magnetic clutch connected to the AC compressor engages. If it does not spin, this could indicate that the system is low on refrigerant. Have a mechanic refill the system. If the magnetic clutch is receiving voltage but is not engaging the compressor, the clutch may be defective and need to be replaced.
5. Inspect all the AC hoses for any leaks. If you notice an excessive amount of green, oily residue on the hoses, they may need to be replaced.
6. Check the AC system (with the engine turned off) for adequate pressure. Remove the black caps from the service ports on your Chevy Truck's AC unit. Screw the blue hose to the low-side service port and the red hose to the high-side port. Evaluation the two AC/heater hoses (with the engine running) under the hood. The hoses protrude from the firewall and are roughly the thickness of a garden hose. The firewall is the metal division that separates the engine compartment and the passenger compartment. City your labourer on the two hoses. They should both be pleasant to the touch.
