Ford A/C :: 1994 F150 - Compressor Spinning But Hot Air Blowing
Aug 2, 2009
The Truck: 94 F-150 XLT 5-speed 300-I6
The Problem: AC blowing hot air.
What I've done: Start the truck, look at the compressor, (looks like it's spinning to me), engage the AC, look again (yep the pully on the compressor is still spinning).
And that's pretty much where i stopped, cause i don't know what i'm looking for, should i be seeing it not spin if it where seized, and whats next on the list to check.
I assume that it's not seized at this point and it must be something else, like a control, keeping it from working.
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How often should my A/C clutch be cycling when the compressor is being used. (i.e defrost, mix, a/c and max a/c). My clutch never cycles, it starts spinning when I turn something on and it does not shut off until I shut off the a/c. The truck is a 95 F-150 4.9L 5 speed...
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Not getting any cold air. A/C compressor is not spinning. Fuses look ok. What else can I check before I take it to a shop?
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I bought auction car, a/c just blowing warm air. a/c light blinking. this highlander limited no manual dial. I have checked relay and working fine, the compressor is not spinning no matter what i try.
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'99 Frontier (3.3L), 140k miles. Just had fan clutch, radiator and belts replaced. Now noticing that the a/c compressor clutch (pictured below) is noisy when the 3 discs stop spinning while I'm driving...it's a noticeable "clack" sound that I can hear with the windows UP.... is this normal? Is there any cure, like lubrication it needs? I pushed on the belts a bit, they don't seem too tight....
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I have a 2000 F-150 4.3l and a/c compressor will not come on. I checked the pressure on both high and low side, low side is sitting at 90# and high side at 100#, with nothing engaging on clutch. I turn the fan to max a/c and fan to high and light comes on on dash for a/c, but I can't hear anything engaging on compressor and clutch looks like it is standing still while belt is rotating on engine. Had to check here to get fuse schematic and check fuses, but beyond that not sure what to do next.
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1992 f150 4.9L, bought it a couple of months ago knowing the ac wasn't working PO had it converted to 134, said it worked great until they put on the bodylift. Compressor clutch is working, I'm sure I have some blend door issues but I've bypassed the heater for now.
AC on max, outside temp 85*, engine off high/low at 100psi, engine at idle low 55psi high 125psi, center vent reads 93*. When engine at apox. 1800-2000 rpm, low 35, high 180, center vent reads 85*.
My guess is the compressor is worn out. Is there another way to test? If I do replace what else do I need to replace? I'm hoping there's something else I can do/check before replacing the compressor.
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2007 Ford F150 half-ton. No cooling of air at the outlet of the ductwork. Freon charge is good, I watched the tech pull the system down and hold it for the prescribed time period. Compressor will not start. I am being told that this means a failed compressor, but I am of the idea that the pressure switch for low pressure must have failed, or the orifice is stopped up. I am also being told that the compressor, evaporator, and orifice tube needs replaced in order to remedy this issue. The counter man at my local parts house cannot find in his computer any pressure switches, kinda making me think that everything is in the unit. In short, if I can avoid buying the compressor, I would like to.
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I bought a 1977 Ford truck a couple of years ago. It has factory air, but the compressor was removed and the hoses were capped and/or poorly taped off when I bought the truck.
I got the bright idea, I'd try to get the air going, but I didn't know anything about a/c systems. I bought a York type (same as what it would have had originally) compressor from Autozone. They told me it was for r134. I put it on the truck along with a new filter/dryer and new expansion valve.
I took the truck to the local shade tree mechanic and he stuck a el cheapo vacuum pump on it for a little while and threw some oil and two or three cans of r134 in it. Well... since then, two summers have passed and it has never worked right.
The compressor really vibrates at low rpms. The air is just barely cool enough to tease me into thinking I have air conditioning. I know this sounds odd, but it seems to work best after I've sat at a stop sign and then take off. It's like idling the engine allows it to "catch up to itself" and then when I drive about 30 mph after a stop sign it actually blows pretty cool for a couple of minutes. But at highway speeds it isn't cool at all. This seems to be the opposite of what I've read. I had the heater & a/c box all apart changing the heater core and all the doors and seals are in good shape inside it. I don't think I'm getting outside air in. At least not in any quantity.
Last summer a friend tried to had one of those cheap gauges and he tried to put some r134 in it but it didn't accept much at all; and it didn't work. I've had about as much as I can take. I need some air conditioning. Should I try to flush out the system, install a new filter/dryer, and get a fresh charge of r12? I'm concerned about trying that because the kid at Autozone told me the compressor was for r134.
I'm pretty confident I don't have any leaks in the system.
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I did a C6 swap on my '94 F150 4x4 recently to replace the M5OD the previous owner burned up. Just to check on things I hooked a brand new autometer trans temp gauge up to check out the temps. What I'm worried about is that on the highway (60-70 mph) it climbs up to 210*.
This was at night at about 75* outside temp. I know the C6 doesn't have a lockup converter, but these temps seem kind of high. It's not a heavy truck, not towing anything and I'm running stock sized 235's with 3.08 gearing.
For now I'm just using the internal radiator trans cooler, but I have a large factory bolt on cooler from an F350 of the same year that I plan on putting on. I have the gauge sender in the drivers side test port just in front of the shift linkage. I'm also running a deep pan that adds 2 quarts to the system.
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I just picked up a '94 7.3 IDI Turbo, and I can't figure out what ails the AC. It appears that there should be enough refrigerant (according to my recharge kit), but the compressor clutch will not engage. I have checked the fuses, and all are fine. All other HVAC functions are normal. Is there a way to test the compressor?
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I got a funny shifting issues that happens infrequently that I can no figure out. It happens after driving the car for a while on the highway, but not every time, and not just on the highway.
Here is my problem... when cruising down the highway the check engine light will come on stay on for a around a minute, the the check engine light will turn off, then of which my truck will lose power, not accelerate no matter how much I stomp on the gas, until my speed drops to under 55mph.
Once I get down to 55mph the truck will drop 2 gears into 3rd gear and then I can accelerate back up to speed. This will repeat every few miles. The computer will not store the check engine code, so no codes are pulled.
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My 94 F150 has been actingup lately with the 4r70 transmission not shifting into 3rd gear or above. I replaced the MLPS sensor and re pinned the plug as per the instructions with the switch.The old sensor had the plug on the side, same type of plug, but wires indifferent spots. Truck wouldn't start like that, so repinned to match the instructions. I couldn't get the neutral mark to 100% line up as there is not enough adjustment, but it is very close.
The old plug had
32-298-140-33
57-199-359-463
I switched it to
57-359-199-463
33-140-298-32
Then tried
463-359-199-57
33-140-298-32
Truck still won't shift to 3rd, overdrive off button doesn't light up and itwon't start in neutral. I tested the ground at the connector and it lights up atest light connected to the pos bat cable with no issues.
Back up lights won't work, but flicker as going from R to N, so I suspect that is due to the fact I couldn't get the marks to line up 100%, but i'm not worried about that now.
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I have a 94 Ranger with 2.3L motor. Last week my ac quit working. I push the in and the ac light goes on, but the compressor clutch won't engage. I changed the relay, but that didn't work. The fan still works, but the ac does not come on. I tried banging on the compressor pulley, but that didn't do anything. The clutch is not frozen -- it spins freely. The connector looks good and I haven't done any work in the engine compartment so I couldn't have accidentally moved any wiring. What I might try or is my compressor simply dead?
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I have a 94 f150 with the 351 and i was wondering how loud it would be with that huge stock muffler cut off and jsut the two cats still in place. I heard the cats will still quite it down a little bit cuz I don't want anything obnoxiously loud...
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Have and intermittent condition with my 1996 F-150 4.9. AC runs and then cuts out (compressor not turning). I lose 12v to both side of high side switch. I tried to troubleshoot using a schematic in Haynes Foprd Pickups and Bronco for 92 and later F-Series/Bronco, but the color code for the wiring doesn't match up.
On my truck, there is 2 wires from the low side pressure switch which mates to a socket with only 1 wire. I have 12 volts at switch terminal on dash control, and it seems that I have an broken wire behind the dash, as I can get it to operate again when I move the harness around. Where can I get a schematic of this part of the circuit?
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Ford F-150, 1994 : intermittent problem. going down highway, foot on the gas. At times, will press accelerator to go faster but nothing happens, like clog somewhere. Sometimes, with foot still on gas, i will hear a popping sound coming from under the truck, (under the engine?, or drivers seat). Usually 4-5 pops, sometimes none. But after each pop, car accelerates slightly, as if it is a slight clearing, until finally, as if some clog was opened up, the car plunges forward, so i then take my foot off the gas. Sounds like either problem with fuel getting to the engine or a problem with the exhaust.
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Daughters 94 f150 4.9L 204K miles e40d started leaking transmission fluid from the bell housing, so she parked it for 2 years...Now I have been nominated to fix it... Truck was running good when parked. Got it started (Just charged battery and started it up), and backed it up. Reverse is good and solid. When I tried to move it, it wouldn't move in drive. Starts to engage, then drops out. Pulled into first, and the truck moves, but have to have high rpm.
Replaced tc seal, filter and fluid, (12 quarts). No change... Ran it down the road, had to start off in first, good power up to about 35, shifted to second, it shifted...ran up to 45, then shifted into drive, it shifted, and maintained power. Had to slow so stopped and turned around, tried moving out in drive, and it just kept dropping out. Returned home as I left...read a lot of this forum, and learned some but not enough..
Pulled codes 327,116,536,538. No transmission codes.
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I have a 1994 f 150 5.8l 4x4 with 215000. Cold starting is fine runs well. After running it will not start after shut down. Wait till motor cools back down will start up and run fine ....
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I had a small leak in my 94 Explorer which was getting on the compressor pulley and being splattered around the engine compartment. The fluid was green like antifreeze--which didn't make sense; why would antifreeze be leaking from the air con compressor? But as an experiment, I got a non-AC belt and ran the truck without the compressor pulley turning, and the leak has stopped! The level in the coolant overflow tank has dropped an inch or two in the last 500 or so miles. Is it possible that antifreeze is getting into the air con system somehow, like through an internal leak in the heater core?
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I have a 1994 F150 XLT 5.0 . The problem i am having is when I turn the ignition on I hear the fuel pump come on [both front and rear tanks] and it should stop when the system is pressurized but it does not,and the truck then fails to start. Intermittantly the pump does stop and the truck starts up.
There is fuel at the rail and there is spark,i have changed the filter ,fuel pressure regulater and the pump relay to no avail.
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