2004 TBIRD AIR CONDITIONER

  • Tiny
  • eval
  • 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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Saturday, November 20th, 2010 AT 6:21 PM

11 Replies

  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,409 posts

Is the AC compressor cycling?

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Saturday, November 20th, 2010 AT 6:27 PM
  • Tiny
  • eval
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Yes

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Saturday, November 20th, 2010 AT 6:52 PM
  • Tiny
  • Jacobandnickolas
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  • 68,409 posts

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.

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Saturday, November 20th, 2010 AT 8:53 PM
  • Tiny
  • eval
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Ok I will check that. Can you tell me how to correct those diagnostic codes?

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Saturday, November 20th, 2010 AT 9:58 PM
  • Tiny
  • Jacobandnickolas
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You can try disconnecting the battery to see if that resets them. If not, it will need done by a scanner.

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Saturday, November 20th, 2010 AT 10:10 PM
  • Tiny
  • eval
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The diagnostic scanner when ran gave me those codes but did not tell me how to correct the problems, does that make sense?

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Saturday, November 20th, 2010 AT 10:24 PM
  • Tiny
  • Jacobandnickolas
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Each code identifies a different problem. Is that what you mean?

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Sunday, November 21st, 2010 AT 2:57 AM
  • Tiny
  • eval
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Yes that is correct but it does not tell me how to fix the problems.

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Monday, November 22nd, 2010 AT 1:04 AM
  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,409 posts

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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Monday, November 22nd, 2010 AT 2:11 AM
  • Tiny
  • eval
  • Member

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.

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Monday, November 22nd, 2010 AT 5:05 PM

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