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A/C operation

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mp470

A/C operation

Anyone's original A/C still working?

I've got voltage to the pressure switch but nothing coming out of it. There is some refrigerant in the system still. Not holding my breath to get it fixed as there is no more R-12, just out of curiosity.

1985 F-150 XLT Lariat, 5.0 EFI, RWD, 8.8 Axle

85lebaront2

Re: A/C operation

Administrator

Mine worked fine until I had to open it for a different reason (non-A/C) at which time I went ahead and converted it to R134a. It worked great as a conversion. I got a 1996 system from a rolled 1996 F150 and bought a later condenser as the one from the F150 was suspect and the later ones can't be cleaned.

Bill AKA "LOBO" Profile

"Getting old is inevitable, growing up is optional" Darth Vader 1986 F350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator Wife's 2011 Flex Limited Daily Driver 2009 Flex Limited with factory tow package Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413

FuzzFace2

Re: A/C operation

If nothing out of the switch I would say its low on PSI and to test that jump the switch out and see if the compressor runs but don't run it long.

As for R-12 check with different shops as they may have some stored away. It's not like they got rid of it when new stuff went 134a.
Dave ----

Dave G.
81 F100 flare side 300 six / AA OD / NP435 / 2.75 gear
http://cars.grantskingdom1.com/index.php/1980-Ford-F100?page=1
81 F100 style side 300 six/SROD parts truck -RIP
http://cars.grantskingdom1.com/index.php/1981-Ford-F100

PetesPonies

Re: A/C operation

In reply to this post by mp470

Those switches go bad. So if you think there is enough freon, just jump the switch and see if the compressor come son and blows cold.

Pete's Ponies
Mustang RUSToration & Performance

1982 F100 Flareside
1983 Bronco

mp470

Re: A/C operation

Yep, jumped it and the clutch kicked on. But then some smoke or maybe steam started coming out around the accumulator area so that cut the experiment short. Wasn't electrical, not sure where it came from.

1985 F-150 XLT Lariat, 5.0 EFI, RWD, 8.8 Axle

Gary Lewis

Re: A/C operation

Administrator

How long had it run before the smoke or steam came up? I can't imagine what would cause that unless you have a leak there.

Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

mp470

Re: A/C operation

I noticed it after 10 seconds of running or so. Is the evaporator in the black housing? Maybe it was coming from in there.

1985 F-150 XLT Lariat, 5.0 EFI, RWD, 8.8 Axle

Gary Lewis

Re: A/C operation

Administrator

You ought to find out where the smoke or vapor came from. The evaporator is in the black housing, but I can't see it being cold enough in 10 seconds to cause vapor.

Gary, AKA "Gary fellow": Profile

1986F150Six

Re: A/C operation

Administrator

Wouldn't Freon "smoke" almost immediately at lower pressure, like when coming out of the can?

Gary Lewis

Re: A/C operation

Administrator

Yes. But if there was a leak that big wouldn't it have all come out by now?

Gary, AKA "Gary fellow": Profile

1986F150Six

Re: A/C operation

Administrator

Is it possible that there is a difference in pressure [high side/low side] of a system so that when the compressor is energized [jumped] that some Freon which had been "trapped" would be moved to the side which goes to the evaporator?

Gary Lewis

Re: A/C operation

Administrator

Maybe. I think I'd jumper the switch with a video camera running. But, don't run the compressor long.

Gary, AKA "Gary fellow": Profile