AC system
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and yes new orifice tube
oh and to add to it the compressor will no longer come on. Maybe thetes a major relay that controls all of this I knocked lose?
Fleet Owner
Joined: Apr 2012
Posts: 27,307
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From: Spanaway
If your noting getting vacuum to the contrl you need to be
sure that you still have vacuum at the tank. I'll look and see
if there is a diag PDF for the vacuum system. There is some
line routing info in SECTION 412-00 Climate Control System - DIAGNOSIS AND TESTING.
sure that you still have vacuum at the tank. I'll look and see
if there is a diag PDF for the vacuum system. There is some
line routing info in SECTION 412-00 Climate Control System - DIAGNOSIS AND TESTING.
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ya I'm going through them now. The compressor doesnt turn on one does that valve close but the vents will change from face to defrost etc.
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Alright so some good news dont know how but got the vacuum pump to run and the compressor came on so thats promising. The a.c. is still hot in the cab though. The line with the orifice tube in it gets ice cold but inside cab is warm I don't get it. The vacuum pump was definitely not running and the valve was not closed followed DTR video on troubleshooting it and it came on and closed the valve and the ac compressor also came on. I'm wondering if the evaporator is clogged? Maybe not allowing air flow? Sorry I kinda ask questions as they come I dont know how this system works much so I'm trying to make sense of it all. If the evaporator is clogged can I clean it? If so where? Or do I need to just replace it? Also I read the troubleshooting guide and it seems to be for the climate controlled trucks like with the digital display so Idk if mine will work the same.
Lead Driver
Joined: Jul 2004
Posts: 6,950
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From: Foothills, CA
But when in the Max (recirc. cabin air) setting is when the cab begins to warm?
If the evap was plugged (no air flow through it), you should never get cold air. So I'm thinking it has more to do with the air flow routing THROUGH the Evap. Not sure how the blend-door works, but I do recall another AC problem thread that it turns out some piece of material was blocking that door from functioning correctly...
On edit: here, I found this:
https://www.ford-trucks.com/how-tos/...nd-door-361491
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I'm no AC expert (far from it), but just from what you have posted: the system works well (now) as long as it is not in the MAX setting, is that correct?
But when in the Max (recirc. cabin air) setting is when the cab begins to warm?
If the evap was plugged (no air flow through it), you should never get cold air. So I'm thinking it has more to do with the air flow routing THROUGH the Evap. Not sure how the blend-door works, but I do recall another AC problem thread that it turns out some piece of material was blocking that door from functioning correctly...
On edit: here, I found this:
https://www.ford-trucks.com/how-tos/...nd-door-361491
But when in the Max (recirc. cabin air) setting is when the cab begins to warm?
If the evap was plugged (no air flow through it), you should never get cold air. So I'm thinking it has more to do with the air flow routing THROUGH the Evap. Not sure how the blend-door works, but I do recall another AC problem thread that it turns out some piece of material was blocking that door from functioning correctly...
On edit: here, I found this:
https://www.ford-trucks.com/how-tos/...nd-door-361491
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I'm no AC expert (far from it), but just from what you have posted: the system works well (now) as long as it is not in the MAX setting, is that correct?
But when in the Max (recirc. cabin air) setting is when the cab begins to warm?
If the evap was plugged (no air flow through it), you should never get cold air. So I'm thinking it has more to do with the air flow routing THROUGH the Evap. Not sure how the blend-door works, but I do recall another AC problem thread that it turns out some piece of material was blocking that door from functioning correctly...
On edit: here, I found this:
https://www.ford-trucks.com/how-tos/...nd-door-361491
But when in the Max (recirc. cabin air) setting is when the cab begins to warm?
If the evap was plugged (no air flow through it), you should never get cold air. So I'm thinking it has more to do with the air flow routing THROUGH the Evap. Not sure how the blend-door works, but I do recall another AC problem thread that it turns out some piece of material was blocking that door from functioning correctly...
On edit: here, I found this:
https://www.ford-trucks.com/how-tos/...nd-door-361491
Lead Driver
Joined: Jul 2004
Posts: 6,950
Likes: 510
From: Foothills, CA
I just read that post and I wonder if that is part of my issue. When the blend door is closed on max ac should the heater core be completely blocked off? When I pulled the cover off the heater core under the dash you could feel the air rushing in but also over the hot heater core (this was when the valve wasnt working). My actuator works I watched it move but didnt think of the physical blend door.
And I will confess I didn't look at even one of Sean's most appreciated PDFs...
I am guessing here, based on the posts and threads one comes up with searching on your symptoms...
Good luck,
Scott
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Based on the "lite" reading I've done on your issue, I personally would not be chasing after another heat exchanger as the problem; just based on how many folks have had issues with the air flow in our, and even later, series of Ford trucks...
And I will confess I didn't look at even one of Sean's most appreciated PDFs...
I am guessing here, based on the posts and threads one comes up with searching on your symptoms...
Good luck,
Scott
And I will confess I didn't look at even one of Sean's most appreciated PDFs...
I am guessing here, based on the posts and threads one comes up with searching on your symptoms...
Good luck,
Scott
Fleet Owner
Joined: Apr 2012
Posts: 27,307
Likes: 549
From: Spanaway
I just got in the house a bit ago. I had a project that bit me in the ***.
Condenser is the one in the front of the radiator.
The evaporator is the one in the heater box.
What one are you doing? If your going to open
the system again did you pick up an orifice tube?
Condenser is the one in the front of the radiator.
The evaporator is the one in the heater box.
What one are you doing? If your going to open
the system again did you pick up an orifice tube?
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I'm gonna do evap I already did condensor, orifice tube, and dryer.
Hotshot
Joined: Jul 2005
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From: Middle Tn.
Sorry can't help you on pressure readings - your AC guy should know. If you replace the condenser, a friend told me always replace the receiver/drier whenever you replace other components in the system, as I think that is where it filters the refrigerant?
I don't think they are that expensive, but haven't checked for our trucks. Hope someone with more knowledge can step in here...
Scott
I don't think they are that expensive, but haven't checked for our trucks. Hope someone with more knowledge can step in here...
Scott
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I did. Changed dryer, condensor, and orifice tube. I'm waiting on the evaporator to change next.