Truck overheats when A/C is turned on.

60

Asked by Jun 23, 2016 at 02:06 PM about the 1994 Ford F-150 XL Stepside SB

Question type: Maintenance & Repair

I have a 1994 Ford F150, that starts overheating as soo. As
i turn on the A/C, and goes back to normal when i turn it off.

-The antifreeze looks prety clean in the radiator.
-Replaced water pump

Please help i live in texas, and REALLY need my A/C

3 Answers

10

You can NOT read quality of antifreeze/coolant by lookong at it. Have it tested at a local parts store. Better yet just flush it if in question. As far as a/c on you need to check for air bubbles in the cooling as well as the clutch fan. If the fan spins too freely it won't cool. Check also and make sure the fins on the radiator aren't bent or clogged.

1 people found this helpful.
23,220

Use a garden hose and nozzle to clean radiator and condenser coil fins if partially clogged with dirt and bugs will cause your problem.

1 people found this helpful.
9,675

Sounds like u don't have enough cooling or ur ac compressor might be dragging due to bad bearing putting excess load on engine. Check water flow in radiator after it reached operating temperature to see if thermostat opens and water pump is pumping

1 people found this helpful.

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