AC issues. Only coming through defrost vent…??
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Tuned
Joined: Jan 2020
Posts: 338
Likes: 112
From: Southern California
AC issues. Only coming through defrost vent…??
Can anyone guide me in troubleshooting my AC issues?
1) recently AC stop blowing through front vents and now only blows through defrost vent.
2) how do I recharge my AC? Still blows cool but not very cold.
I own 95 F250 XLT 2WD automatic with 230k
I have been absent for awhile but from past help I received here, the issues I had were fixed by information obtained from this forum.
thanks in advance for your support!!
-Jeremy
1) recently AC stop blowing through front vents and now only blows through defrost vent.
2) how do I recharge my AC? Still blows cool but not very cold.
I own 95 F250 XLT 2WD automatic with 230k
I have been absent for awhile but from past help I received here, the issues I had were fixed by information obtained from this forum.
thanks in advance for your support!!
-Jeremy
Lead Driver
Joined: May 2009
Posts: 6,807
Likes: 704
From: Tobyhanma, PA
The vent issue is usually a vacuum issue. By heater box under the hood should be a black box with lines going to it. I believe that helps control the hvac stuff.
You can recharge at alot of places if using R134a. Might want to check it for leaks, most shops machine would do this automatically, also.
You can recharge at alot of places if using R134a. Might want to check it for leaks, most shops machine would do this automatically, also.
Thread Starter
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Tuned
Joined: Jan 2020
Posts: 338
Likes: 112
From: Southern California
The vent issue is usually a vacuum issue. By heater box under the hood should be a black box with lines going to it. I believe that helps control the hvac stuff.
do you know what I should be troubleshooting for? Damaged vac lines maybe or is it a mechanical issue in this case only a part replacement?
You can recharge at alot of places if using R134a. Might want to check it for leaks, most shops machine would do this automatically, also.
do you know what I should be troubleshooting for? Damaged vac lines maybe or is it a mechanical issue in this case only a part replacement?
You can recharge at alot of places if using R134a. Might want to check it for leaks, most shops machine would do this automatically, also.
what is easiest location to refill R134a in the system?
thanks for your time!
-Jeremy
Lead Driver
Joined: May 2009
Posts: 6,807
Likes: 704
From: Tobyhanma, PA
The system has 2 ports, high and low pressure, that the proper machine hooks into to recover, test, and recharge through.
If you want to try the cans from the auto store they only fit on one port. The ports are sized different to prevent hooking up incorrectly.
The right way, is to use a shop machine and recover old refrigerant, pull vacuum,, and recharge with new oil and R134a.
If you want to try the cans from the auto store they only fit on one port. The ports are sized different to prevent hooking up incorrectly.
The right way, is to use a shop machine and recover old refrigerant, pull vacuum,, and recharge with new oil and R134a.
Hotshot
Joined: Dec 2012
Posts: 11,271
Likes: 1,654
From: Las Cruces New Mexico
Under the hood on passenger side firewall there's a diaphragm that has a white vacuum line which usually rots away, you can easily fix it by using 3/16 vacuum line.
As for refilling your AC system if you have no AC gauges it's better to take it to an AC service place and have them check pressures you might have the right amount but there could be a problem with the fan clutch, clogged condenser (covered in mud, or grass etc..) which can easily be cleaned out.
As for refilling your AC system if you have no AC gauges it's better to take it to an AC service place and have them check pressures you might have the right amount but there could be a problem with the fan clutch, clogged condenser (covered in mud, or grass etc..) which can easily be cleaned out.
Lead Driver
Joined: Sep 2002
Posts: 9,539
Likes: 2,030
From: North Texas
Buy some good gauges, Mastercool or Yellowjacket. Any decent vac pump works fine, even a Harbor Freight one...run it in, change oil. Then use it. Buy a good side can tap.
Truck takes 38oz of 134A. Easiest to buy three, 12oz cans. Highly recommend to buy an oil charge can, most places just do refrigerant only. Even a few ounces of oil helps.
Inspect vac lines as stated. Pull fan and make sure no **** is plugging evap. If have a bug sprayer douche it out with something like Purple Power or Simple Green. Clean condenser while farting around. Road debris plugs em with junk.
Verify has RED orifice tube.
Keep us posted once these steps are taken.
Truck takes 38oz of 134A. Easiest to buy three, 12oz cans. Highly recommend to buy an oil charge can, most places just do refrigerant only. Even a few ounces of oil helps.
Inspect vac lines as stated. Pull fan and make sure no **** is plugging evap. If have a bug sprayer douche it out with something like Purple Power or Simple Green. Clean condenser while farting around. Road debris plugs em with junk.
Verify has RED orifice tube.
Keep us posted once these steps are taken.
Thread Starter
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Tuned
Joined: Jan 2020
Posts: 338
Likes: 112
From: Southern California
Thanks to everyone for your help!! It was the vacuum line and I replaced/spliced hose where damage was.
this forum has been a great source for information.
thus far I’ve received help with brakes, drive shaft, transmission torque converter and now my AC. You’ve all been great! Thanks again for keeping my truck going
this forum has been a great source for information.
thus far I’ve received help with brakes, drive shaft, transmission torque converter and now my AC. You’ve all been great! Thanks again for keeping my truck going
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