1989 Ford F-150 AC Repair

Tiny
RPS62
  • MEMBER
  • 1989 FORD F-150
Air Conditioning problem
1989 Ford F150 Two Wheel Drive Automatic 100000 miles

My AC is not working. When I add freon the compressor kicks in but it still won't cool. Is the compressor bad or is it leaking freon. How can you tell if you need a new compressor. My compressor runs smooth. No noise or grinding sounds. Or do I need to change the dryer or check for leaks. Replace all the o rings. Your response will greatly b appreciated
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Monday, September 13th, 2010 AT 9:44 AM

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Tiny
CJ MEDEVAC
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Imma CJ Jeep kinda guy. Who has to maintain my household rigs, repairs and some maintenance for family, and friends too!

From what you are saying. We need some more info.

Was this puppy functioning properly, for a long period, prior to the Shutdown?

Did you maybe have a compressor lock up prior to this one?

How much Cool Juice Have you installed into the system?

Are you using gauges. Understand them?

When it kicks in. Does the suction line get cool. Or even sweat near the compressor? (The fatter one)

Is it kicking in and not staying in. In and out fast and repeatedly?

When it is running (kicked in) What does your GAUGE(S) Show for PSI on the suction side?

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Your Turn. Detailed is GOOD!

The Medic
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Monday, September 13th, 2010 AT 11:55 AM
Tiny
RPS62
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How much freon does a 1989 Ford F-150 5.8L take to make AC unit work? Required amount.
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Wednesday, September 15th, 2010 AT 4:47 PM
Tiny
CJ MEDEVAC
  • EXPERT
In '86 R-12 was still in use

We converted it to R-134

The fittings for "12" are different than for "134"

If yours is already set up for "134" you are good!

If not, you need to hit Autozone or Advance Auto for a Adapter Fitting for "134"For the Low side only (the employees) can show you LOW SIDE!.....high side is for more advanced testing that maybe you are not "skilled" for.......Low is for filling the system---Kinda EZ to doDO NOT TRY TO FILL THE HIGH SIDE!!!!!!!

At one time, maybe you still have it, The A/C CAPACITY is on your truck SOMEWHERE!.....Under the hood, door, glove box door, owners manual, and Repair Manuals .........Parts Store guys may have it in their books.

Regardless---you are only going to fill, TILL FULL, according to a GAUGE.....not to the decal....especially if you still have gas in it!

Here are things you need:

Gauge on a hose separate from fill bottle (video below will show one)reuseable!

A fill hose (for cans)----Reusable!, unlike the all in one cans

You might need "AN OIL CHARGE"---ask at store, tell them your WHOLE HISTORY and SITUATION to determine whether to get oil or not

DO NOT PUT IN TOO MUCH OIL!!!!!......parts guy question....eyes on.......hands on

3 Cans of "134" should be plenty (always is for me, even if the system was empty).........unless you have a van or a rig with a rear Evaporator (2 A/C systems)

Remember, if you are going to remove a can...live and charging......Turn off the valve, remove hose from truck..............Install gauge for Pressure Test/ Check..........Remove gauge hose.........reinstall the Freon can.........open its valve to continue to fill................DO NOT OVER FILL!

Regardless what the gauge says........Your Low line will "SWEAT"......Don't put so much freon in, that the line "SWEATBACK" forms on the compressor inlet on the compressor

SWEATBACK means the gas is turning back into liquid (as it should) But you do not want liquid in the compressor----DAMAGE CAN OCCUR!!!..........So watch the compressor fitting.........You do not want condensation forming there.....on the hose is fine!

Here's your start---several parts to it, should play on thru to them...give it some time.

http://www.2carpros.com/articles/re-charge-an-air-conditioner-system

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The Medic
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Wednesday, September 15th, 2010 AT 9:01 PM

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