Anybody do the cold A/C mod?
Thread Starter
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Modular motor junkie
Joined: May 2009
Posts: 6,190
Likes: 8
From: Texas
Anybody do the cold A/C mod?
I looked at The E350 and the F350, it looks like this mod should work the same on both.
Is there anything diffrent about doing it on the vans? The reason I ask is the single A/C vs Dual A/C, and I don't know if theres more to it than on the pickups.
Is there anything diffrent about doing it on the vans? The reason I ask is the single A/C vs Dual A/C, and I don't know if theres more to it than on the pickups.
Thread Starter
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Modular motor junkie
Joined: May 2009
Posts: 6,190
Likes: 8
From: Texas
On the F250 and 350 the heater core always heats the air coming into the cab, even on max a/c.
If you put a shut off valve in the heater hose it drops the air temp by 10*.
The Ex and some crew cabs got it out of the factory, but the reg cabs, super crews, some crew cabs and the vans did not get this valve, meaning A/C that does not work as well as it could.
I just wanted to make sure that the pick up instrutions apply to the dual A/C.
It seems like it should be the same.
If you put a shut off valve in the heater hose it drops the air temp by 10*.
The Ex and some crew cabs got it out of the factory, but the reg cabs, super crews, some crew cabs and the vans did not get this valve, meaning A/C that does not work as well as it could.
I just wanted to make sure that the pick up instrutions apply to the dual A/C.
It seems like it should be the same.
Lead Driver
Joined: May 2004
Posts: 5,018
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From: Maryville
Tight under the hood, I do know the rear heat runs across the top of the engine, coming in the passenger side crossing over to the drivers side at the rear. The SC trucks have it from the factory, are you certain the van doesn't also, considering the rear AC blows from an entirely different location, it's not gonna improve. I use the rear more than the front so it'll not gain me, the AC is less efficient in traffic due to design, the hod will gain nothing there.
Lead Driver
Joined: May 2004
Posts: 5,018
Likes: 132
From: Maryville
Sorry, think it's the crew cab, van should have it, but I can't see it making a difference, the engine location heats it up.
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I have an 89 E150. the AC has never been cold. I thought it was due to being converted to 134a. I was thinking the same thing. when i was getting it ready for vacation. I was testing the system and noticed warm air in the vent mode. I thought the heater valve must be stuck.... Oh it don't have one..... Let me know how it works.
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Fleet Owner
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From: Easton,Ks
I thought all vans have them from the factory, I know my 88 & 89 does.
I have never seen this on a F-series as it needs the vacuum line that only vans have. Unless they came with an after market heater like my 94 F53 and it is cable operated.
I have never seen this on a F-series as it needs the vacuum line that only vans have. Unless they came with an after market heater like my 94 F53 and it is cable operated.
Thread Starter
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Modular motor junkie
Joined: May 2009
Posts: 6,190
Likes: 8
From: Texas
The F-series has the line there. You have to T into it to do the mod.
Senior User
Joined: Jul 2010
Posts: 140
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From: St. Petersburg, Florida
I have an 89 E150. the AC has never been cold. I thought it was due to being converted to 134a. I was thinking the same thing. when i was getting it ready for vacation. I was testing the system and noticed warm air in the vent mode. I thought the heater valve must be stuck.... Oh it don't have one..... Let me know how it works.
Vaya con Dios,
Chuck, CABGx3
New User
Joined: Jul 2010
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I also have an '89 E150 Club Wagon. When I first bought it, my Mechanic replaced the Expansion Valve on the Rear A/C unit and he told me that he turned off the Heater Valve. And he showed me that it was on the left side of the Engine Compartment between the Battery and the Engine. I live in Florida so only very rarely would need the heater.
Vaya con Dios,
Chuck, CABGx3
Vaya con Dios,
Chuck, CABGx3
Thread Starter
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Modular motor junkie
Joined: May 2009
Posts: 6,190
Likes: 8
From: Texas
Well, I did it and it dropped the temp out of the vents 5-10*.
Very noticable diffrence. And very close to as good as I would like the A/C to be.
Next mod. I want a fan for the front that blows harder. Any ideas?
First thing that came to mind is find a way to increase the volts to the fan in the HI position. Where is the resister located?
Very noticable diffrence. And very close to as good as I would like the A/C to be.
Next mod. I want a fan for the front that blows harder. Any ideas?
First thing that came to mind is find a way to increase the volts to the fan in the HI position. Where is the resister located?