A/C Switch HELP
07-05-2003, 12:30 PM
#1
Instructor
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A/C Switch HELP
The A/C stopped working on my 90 S2 and it is HOT in CT. Relay checks OK so I am looking at the snowflake switch but can't get it out. I took the trim piece off, removed the screws on the clear plastic piece. Seems like inserting a small screwdriver should release the plastic tabs but feels like something else is holding it. Need suggestions.
THANKS
Tom
THANKS
Tom
07-05-2003, 08:54 PM
#3
Track Day
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I think the switch is soldered into the climate control unit. When mine went bad (the switch would not stay in when pressed) I bought a control unit off ebay and replaced the whole front panel assembly.
The switch can be replaced by itself but as I said I think you need to remove the front panel unit and then de-solder the switch and solder in a new one.
Do a search on snowflake switch here on the board and I think you will find some info.
The switch can be replaced by itself but as I said I think you need to remove the front panel unit and then de-solder the switch and solder in a new one.
Do a search on snowflake switch here on the board and I think you will find some info.
07-06-2003, 01:32 PM
#6
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How should the A/C in a 944 work anyway? Mine's never been pumping out really cold air with the switch depressed.
I know the relay's fine, and the shop I took it too about 3 years ago said it was fine, but no ice cold air! what gives?
I know the relay's fine, and the shop I took it too about 3 years ago said it was fine, but no ice cold air! what gives?
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07-06-2003, 02:33 PM
#9
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With the A/C off and the vent blowing outside air does it blow hot? Your heater control could be staying on letting it mix the hot and cold air. From what I have read some have an air control flapper and some have a water control valve. My water control valve was bad and I got heat all the time. A $20 part and about 5 hours to re & re it.
</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by pikey7:
<strong>How should the A/C in a 944 work anyway? Mine's never been pumping out really cold air with the switch depressed.
I know the relay's fine, and the shop I took it too about 3 years ago said it was fine, but no ice cold air! what gives?</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">
</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by pikey7:
<strong>How should the A/C in a 944 work anyway? Mine's never been pumping out really cold air with the switch depressed.
I know the relay's fine, and the shop I took it too about 3 years ago said it was fine, but no ice cold air! what gives?</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">
07-07-2003, 02:14 AM
#11
Three Wheelin'
I've had some trouble with the A/C in my '87, and I traced it to no vacuum to the heater control valve.
Without a vacuum signal the heater control "fails" in the open position. Apparently there is enough heat load from the heater coil to interfere with the A/C. Once I got vacuum to the heater valve the A/C blows nice and cold.
To check your valve start the engine and set the temperature control to full cold (CCW) and then take a look at the position of the control arm on the heater valve (The valve is located at the rear of the engine just behind and below the intake manifold). Now turn the temperature controll to full hot (CW) and check the heater valve. If the arm did not move, then you have a vacuum control problem.
The vacuum ports are located on the passenger side of the firewall directly behind where the heater hose connects to the hard pipe above the exhaust manifold. The outboard port is the supply to the climate control system and the inboard port goes to the heater control valve.
Without a vacuum signal the heater control "fails" in the open position. Apparently there is enough heat load from the heater coil to interfere with the A/C. Once I got vacuum to the heater valve the A/C blows nice and cold.
To check your valve start the engine and set the temperature control to full cold (CCW) and then take a look at the position of the control arm on the heater valve (The valve is located at the rear of the engine just behind and below the intake manifold). Now turn the temperature controll to full hot (CW) and check the heater valve. If the arm did not move, then you have a vacuum control problem.
The vacuum ports are located on the passenger side of the firewall directly behind where the heater hose connects to the hard pipe above the exhaust manifold. The outboard port is the supply to the climate control system and the inboard port goes to the heater control valve.
07-07-2003, 10:04 AM
#12
Burning Brakes
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with the setting at full cold the arm on the heater control valve should be pulled in all the way. It is possible for the seals inside the valve to fail, so that although it closes it does not cut off the flow of hot water, if you suspect this as the problem, pinch off the heater hose behind the valve, while the engine is off and cold, and see if the system works any better.