A/C not working
Discussion
Hoping that the brain trust can find the hole in my logic, and save me from taking my dash apart.
When I push the fan control to turn on the air conditioner, nothing happens. No light, no compressor, no change at all.
I don’t think its fuse 11 or 12 because the interior fan works
I don’t think it’s the ground because the interior fan works
I don’t think it’s the thermostat, trinary switch or relay RR01 because the AC light does not come on.
I fear it’s the switch itself, or the plug to the switch.
The way I am reading the Heating ventilation air conditioning circuit, if fuse 11 and/or 12 is good and the ac switch is working, and the ground point is good, I should have a light at minimum.
Hope there is something I am overlooking.
Any Ideas?
as Jeff said on removing the dash
Quote Originally Posted by NobleM400 View Post
All you need is 3 foot long, triple-jointed arms, eyes and lights embedded in your hands, and more patience than anybody I know. Jeff
Search tags ac a/c air conditioner conditioning con
When I push the fan control to turn on the air conditioner, nothing happens. No light, no compressor, no change at all.
I don’t think its fuse 11 or 12 because the interior fan works
I don’t think it’s the ground because the interior fan works
I don’t think it’s the thermostat, trinary switch or relay RR01 because the AC light does not come on.
I fear it’s the switch itself, or the plug to the switch.
The way I am reading the Heating ventilation air conditioning circuit, if fuse 11 and/or 12 is good and the ac switch is working, and the ground point is good, I should have a light at minimum.
Hope there is something I am overlooking.
Any Ideas?
as Jeff said on removing the dash
Quote Originally Posted by NobleM400 View Post
All you need is 3 foot long, triple-jointed arms, eyes and lights embedded in your hands, and more patience than anybody I know. Jeff
Search tags ac a/c air conditioner conditioning con
I will check the relays in the foot well.
I had been avoiding this path as my step one was just trying to get the light on the fan switch to work.
According to my schematic (US Build manual, Section 8, page 15) power comes in via fuses 11 & 12, goes to the HVAC dash switch.
The AC switch has an output, pin 6, that is tied to the input, pin 5, that goes though the lamp and then out pin 31 to ground.
I have verified that the ground side of this circuit is good (the lamp socket to ground).
I have verified that the lamp is good
I was going to start working backwards and testing the voltage but...
Then I dropped the spring (approx 1.5 mm OD and 20 mm long) that goes between the switch and the back of the bulb into the dash. (new one ordered (i hope I am guessing the size correctly)).
I think to kill time while waiting for the spring, I will:
check the pressure of the A/C system
check the relays in the passenger foot compartment
work on taking the dash apart. (I have read a thread on nobleforums.com where somebody replaced the studs and nuts arrangement with something that makes future removal much simpler.)
Thanks for the input!
I had been avoiding this path as my step one was just trying to get the light on the fan switch to work.
According to my schematic (US Build manual, Section 8, page 15) power comes in via fuses 11 & 12, goes to the HVAC dash switch.
The AC switch has an output, pin 6, that is tied to the input, pin 5, that goes though the lamp and then out pin 31 to ground.
I have verified that the ground side of this circuit is good (the lamp socket to ground).
I have verified that the lamp is good
I was going to start working backwards and testing the voltage but...
Then I dropped the spring (approx 1.5 mm OD and 20 mm long) that goes between the switch and the back of the bulb into the dash. (new one ordered (i hope I am guessing the size correctly)).
I think to kill time while waiting for the spring, I will:
check the pressure of the A/C system
check the relays in the passenger foot compartment
work on taking the dash apart. (I have read a thread on nobleforums.com where somebody replaced the studs and nuts arrangement with something that makes future removal much simpler.)
Thanks for the input!
Update. Seems the switch is bad.
The A/C works if I turn the switch clockwise for fresh air.
The A/C does not work if I turn it anti-clockwise for rec.
I admit I am in the habit of only using the air with the recalculation side.
Ordered a new switch off Ebay UK, part number 6422008
Green3r, would love to see your link of the dash if you have time.
Thanks
Doug
The A/C works if I turn the switch clockwise for fresh air.
The A/C does not work if I turn it anti-clockwise for rec.
I admit I am in the habit of only using the air with the recalculation side.
Ordered a new switch off Ebay UK, part number 6422008
Green3r, would love to see your link of the dash if you have time.
Thanks
Doug
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