recycle air and a/c switch flashing

[chanceboy]

hi guys could anyone help got 3.3 petrol p reg voyager problem is the recycle and a/c switches keep flashing any ideas cheers

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[TNtech]

When the AC head does it's self test (usually after a battery disconnect or a reset) and there is a failure, you will get flashing lights. Most likely it failed the cool-down portion of the self diagnostics. As in, your AC is not getting cold enough at the evaporator fin temperature sensor. Let me dig up my material on these things and i'll post more later.

[chanceboy]

good morning
thank you very much
only just bought it previose owner had heating /direction switches of so will be looking for new as the one for direction just turns if turn slow it will direct to somewhere
once again thanks

[TNtech]

CALIBRATION/DIAGNOSTICS TEST ENTRY

TO INITIATE TESTS:

• Set Blower motor ON HIGH
• Set Mode position to Panel
• Open all A/C outlets
• Set Temperature to Cold (Both slide pots if equipped)
• Depress WASH and REAR WIPER button simultaneously for 5 Seconds (Until all LED's light)

RESULTS:

• All LED's will turn on for 5 Seconds
• Calibration Test is running when REAR WIPER and INTERMITTENT are alternately flashing. Cooldown test is running if A/C and RECIRC are alternately flashing.
• Acceptable results is REAR WIPER LED is the only LED flashing. Push Rear Wiper to exit.
• After all tests have passed, Calibration Diagnostics and Cooldown can be run separately.

COOLDOWN TEST ENTRY

TO INITIATE TESTS:

• Set Blower motor ON HIGH
• Set Mode position to Panel
• Open all A/C outlets
• Set Temperature to Cold (Both slide pots if equipped)
• Depress WASH and A/C simultaneously for 5 Seconds

NOTE: Prior to start of test, If the evaporator is already cold, the system will fail test. To correct, operate system with A/C OFF and the blower motor ON high for three minutes prior to starting test.
RESULTS:

• All LED's will turn on for 5 Seconds
• Cooldown Test is running when A/C and RECIRC. are alternately flashing. If A/C and RECIRC. are flashing simultaneously, Cooldown has failed.

CALIBRATION DIAGNOSTICS AND COOLDOWN ABORT

Test can be aborted by doing one of the following:

• Depressing Rear Window Defogger, RECIRC and Rear Wiper buttons.
• Cycling Ignition OFF and then ON.
• Control will automatically abort after 15 minutes from the time Calibration Diagnostics and Cooldown was entered.

The HVAC control module will return to normal operation or may indicate unsuccessful Calibration Diagnostics or Cooldown test by LED's flashing simultaneously.
EEPROM DATA

Calibration Diagnostics, Cooldown Status and evaporator temperature Fin Sensor values are stored in an EEPROM memory internal to the control. The microcomputer within the HVAC control module uses this information:

• To determine if Cooldown needs to run
• For proper position of the Heater-A/C unit assembly doors

[TNtech]

They left out a step in the first tests. Make sure the AC is engaged before you initiate the test. You can't always count on the control head to do it.

[chanceboy]

thanks for that off out to have a play
have a great bank holiday
i owe you a pint
cheers
keith

[wen]

Thanks sir, I have a 1997 grand voyanger van same as this issue and I followed your structure to adjust it. It was fail. I checked A/C compressor which didn't run.How do I do to let A/C engaged?