A/C question
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Freshman User
Joined: Aug 2005
Posts: 48
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From: Benton, Arkansas
A/C question
I just bought this truck about a month ago and it didn't come with a owners manual. I have one on order. My question is this, one day my a/c is working the next day I don't even get a display or anything. I figure it's a fuse but they aren't plainly marked so I don't know which one to check. Any help would be greatly appreciated considering it's pushing 100F everyday. Thanks
Post Fiend
Joined: Apr 2004
Posts: 19,098
Likes: 8
From: Great State of Texas
Hope this helps. 
Various Electronic and Driveability Symptoms and Codes:
2005 F-Super Duty trucks built before 5-11-05 may exhibit various electronic-related symptoms due to loose/miss-installed fuses in the engine compartment fuse box. These symptoms may be intermittent. The fuses should be inspected to verify they are installed into the terminals in the fuse box and not along side the terminals.
Fuses--Symptoms
#9, 20 amp: Trailer turn signals inoperative
#10, 10 amp: Check Engine Light; Codes P1633, P0446
#11, 10 amp: Speedo bounce, ABS light, Cruise control inop; Codes U1900, U2023, P0500-P0503
#12, 2 amp: Cruise control inop, TBC Fault displayed, chime; Code C2803
#13, 15 amp: Day time running lamps inop
#15, 15 amp: Crank/no start, bucking, stall; Codes P2614, P2617, P1378
#17, 10 amp: A/C inop or not cooling
#18, 10 amp: Crank/no start, bucking, stall; P2614, P2617, P1378, P0611
#20, 10 amp: Trailer back up lamp inop
TSB 05-11-14
Lack of A/C Cooling at Highway Speeds/Rapid Compressor Clutch Cycling:
This may be due to low suction pressures causing the A/C compressor clutch to cycle too rapidly. On vehicles built before 7-18-04, recover the refrigerant from the system and recharge with 45 OZ on single A/C and 68 OZ on dual A/C vehicles. These capacities are different than shown on the A/C specification lable. Trucks built after 7-18-04 are factory filled with the above capacities even though the label has not been updated. Broadcast Message 3233; 4399.
Various Electronic and Driveability Symptoms and Codes:
2005 F-Super Duty trucks built before 5-11-05 may exhibit various electronic-related symptoms due to loose/miss-installed fuses in the engine compartment fuse box. These symptoms may be intermittent. The fuses should be inspected to verify they are installed into the terminals in the fuse box and not along side the terminals.
Fuses--Symptoms
#9, 20 amp: Trailer turn signals inoperative
#10, 10 amp: Check Engine Light; Codes P1633, P0446
#11, 10 amp: Speedo bounce, ABS light, Cruise control inop; Codes U1900, U2023, P0500-P0503
#12, 2 amp: Cruise control inop, TBC Fault displayed, chime; Code C2803
#13, 15 amp: Day time running lamps inop
#15, 15 amp: Crank/no start, bucking, stall; Codes P2614, P2617, P1378
#17, 10 amp: A/C inop or not cooling
#18, 10 amp: Crank/no start, bucking, stall; P2614, P2617, P1378, P0611
#20, 10 amp: Trailer back up lamp inop
TSB 05-11-14
Lack of A/C Cooling at Highway Speeds/Rapid Compressor Clutch Cycling:
This may be due to low suction pressures causing the A/C compressor clutch to cycle too rapidly. On vehicles built before 7-18-04, recover the refrigerant from the system and recharge with 45 OZ on single A/C and 68 OZ on dual A/C vehicles. These capacities are different than shown on the A/C specification lable. Trucks built after 7-18-04 are factory filled with the above capacities even though the label has not been updated. Broadcast Message 3233; 4399.
Elder User
Joined: Aug 2004
Posts: 932
Likes: 4
From: Edmond, OK
Thread Starter
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Freshman User
Joined: Aug 2005
Posts: 48
Likes: 0
From: Benton, Arkansas
I took it in to a local new car dealer and they advised me that they had seen this several times and it wasn't a fuse. They said it was the controller on the dash. Costs over $600.00 to replace with labor. They advised to run it until I couldn't stand the heat anymore. Of course, as soon as I pulled into the lot it started working again. At that price I just hope it keeps working.Thanks!!
Cargo Master
Joined: May 2006
Posts: 2,116
Likes: 6
From: Florida
the dimmer set all the way to off ,will shut off the display to the a/c and radio displays. as i noticed it on mine when i was driving the other day. i had no dispaly, but set the dimmer and voila!
Senior User
Joined: Dec 2005
Posts: 214
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Originally Posted by fireman_19
My radio was working fine, just no a/c. I mean no display, no fan, no nothing.
Helps to lower the tilt wheel all the way down and put gear selector in 1st and then turn the truck off.
Wiggle the things around back there and you might find what's loose
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Freshman User
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From: Benton, Arkansas
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