AC not getting cold
Tuned
Joined: Jan 2005
Posts: 314
Likes: 16
From: northeast
Mine was always fair in my 04 screw. Even after recharging and checking blend door. Probably doesn't help that its black with black leather !!! Added a 1/4 turn ball valve to shut off the heater core ..... much better 
Posting Guru
Joined: Jul 2005
Posts: 1,006
Likes: 0
From: San Jose, CA
I also considered adding a ball valve inline with the heater core, and I came pretty close to doing it!!
Short of doing that, 'rebooting' my MTAC (sp?) controller seems to have helped. Disconnect the battery and reconnect it after a couple minutes. When power comes back the blend door 'recalibrates' itself.
It was 95F over the weekend, and it seemed to cool ok after sitting in the sun. Not as cold as my SD, but definitely better than before I rebooted it.
Short of doing that, 'rebooting' my MTAC (sp?) controller seems to have helped. Disconnect the battery and reconnect it after a couple minutes. When power comes back the blend door 'recalibrates' itself.
It was 95F over the weekend, and it seemed to cool ok after sitting in the sun. Not as cold as my SD, but definitely better than before I rebooted it.
Cargo Master
Joined: Nov 2003
Posts: 2,000
Likes: 39
From: North Dakota
Where did you find the ball valve?
Cargo Master
Joined: Nov 2003
Posts: 2,000
Likes: 39
From: North Dakota
I was thinking of doing that but I was not sure if the nylon fitting in the ball valve could handle the heat. What diameter did you go with?
Also, is the intake line to the heater core the one coming from near the water pump?
Also, is the intake line to the heater core the one coming from near the water pump?
Tuned
Joined: Jan 2005
Posts: 314
Likes: 16
From: northeast
The ball valve i used is a Watts brand made of brass 1/2 ".....used in plumbing applications. I also purchased a 4" nipple threaded on both ends(Brass)and cut it in half. Srewed the 2" threaded ends into the ball valve ( I teflon taped the threads). Cut heator core hose up by the firewall. Push the heater core hose over the brass pipe up to the base of the ball valve (very tight fit....it will go). Secure with a couple hose clamps. Maybe 15 dollars for everything....and 10mins of your time.
Hotshot
Joined: Feb 2003
Posts: 11,537
Likes: 27
From: Long Beach, Ms.
I had that problem on my tow truck.
My compressor is the same as any F series.
I did the heater hose valve mod on my E-350 and it was a large help.
I put in a bypass to carry the coolant across the system when the valve was closed. It is the brass "T" at the bottom of the picture.
BTW The dealer is full of ****.
Thread Starter
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Senior User
Joined: Aug 2004
Posts: 454
Likes: 0
From: Centerton, AR
The ball valve i used is a Watts brand made of brass 1/2 ".....used in plumbing applications. I also purchased a 4" nipple threaded on both ends(Brass)and cut it in half. Srewed the 2" threaded ends into the ball valve ( I teflon taped the threads). Cut heator core hose up by the firewall. Push the heater core hose over the brass pipe up to the base of the ball valve (very tight fit....it will go). Secure with a couple hose clamps. Maybe 15 dollars for everything....and 10mins of your time.
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Elder User
Joined: Aug 2006
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...The biggest issue I have is there's some deal with my blend door not shutting off hot air completely. So with A/C off, it's always blowing warm air even if it's cold outside.
Last weekend, I 'rebooted' the temperature controller by unplugging power to the unit and then powered it back up. Same thing happens if the battery is disconnected for a while. You can hear the motor and doors moving around when power comes up again.
The jury is out to see if that makes any diff. Wife has been driving the truck, but she hasn't said/complained about anything yet...
Last weekend, I 'rebooted' the temperature controller by unplugging power to the unit and then powered it back up. Same thing happens if the battery is disconnected for a while. You can hear the motor and doors moving around when power comes up again.
The jury is out to see if that makes any diff. Wife has been driving the truck, but she hasn't said/complained about anything yet...
Senior User
Joined: Jan 2007
Posts: 187
Likes: 0
From: Rural Ida Michigan
The A/C on my '04 crew is weak too. Checked the system many times. I'be mentioned topping it off but adding to it would over pressurize the system. The air temp out of the vents is 48deg when we put a thermometer in it. But still, it doesn't cool well at all any time. There are many components to check and I hope to het it figured out.
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Senior User
Joined: Aug 2004
Posts: 454
Likes: 0
From: Centerton, AR
What inlet/outlet size did you use?
Senior User
Joined: Jan 2007
Posts: 187
Likes: 0
From: Rural Ida Michigan
I believe its just a 1/2" ball valve with 2" nipples on both ends. Cut the hose supplying water to the heater core, and use clamps to secure. Don't over tighten. The wrench size is 1".
