Mechanics

TBIRD AIR CONDITIONER

2004 Ford Thunderbird • V8 FWD Automatic •

Troubleshoot DTC codes for 2004 Ford T bird B1265, B2798, B2799. Air conditioner is blowing hot air.
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Eval
November 20, 2010.




Is the AC compressor cycling?

Yes

Tiny
Eval
Nov 20, 2010.
Okay, if it is cycling, the system is pressurized and not mow on freon. Next check is the blend air door. It is located near the heater core. It determines if you get AC or heat. Check to make sure it is functioning.

Ok I will check that. Can you tell me how to correct those diagnostic codes?

Tiny
Eval
Nov 20, 2010.
You can try disconnecting the battery to see if that resets them. If not, it will need done by a scanner.

The diagnostic scanner when ran gave me those codes but did not tell me how to correct the problems, does that make sense?

Tiny
Eval
Nov 20, 2010.
Each code identifies a different problem. Is that what you mean?

Yes that is correct but it does not tell me how to fix the problems.

Tiny
Eval
Nov 22, 2010.
B1265 - Cold air bypass door actuator circuit failure

B2798 - Driver coolant control valve circuit short to ground

B2799 - Passanger coolant control valve open circuit

Since you have heat all the time, the B2799 I feel is the problem. Here is a test.

1) Key in off position
2) Disconnect coolant control valve
3) Key in on position
4) Measure the resistance between ground and coolant control valve plug.

5) Is the voltage greater than 10 volts?

Let me know.
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Ok so when I try that what happens if the less than 10 volts, does that mean that is the problem? I am getting cooler air from the passenger side control but not as cold as it should be, the drivers side is hot air.

Tiny
Eval
Nov 22, 2010.

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