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Username Post: 98 Monte Carlo Air Conditioning        (Topic#351529)
Posts: 191
Loc: ND
Reg: 01-04-03
06-11-18 08:05 PM - Post#2736662    

1998 Monte Carlo 3.1V6.
Air Conditioner quit working. Compressor does not engage.
So, thought I'd try 1. force compressor on for a minute-see if it cools. 2. then add 12oz refrigerant-check for cooling. 3. check pressure with gauges IF I had them (another day wasted)

TO ADD REFRIGERANT-my Haynes manual says="if compressor cycles off - pull the low pressure cycling switch plug from the evaporator inlet line and attach a jumper wire across the terminals. This will keep the compressor ON".
OK, so were is this 'switch'? I can see where the tubing enters the cabin-back behind the engine. And can see the 2 service ports down below the air cleaner. Can't see any switch. (Haynes manual has one 2X2in pic=nothing)
Looks like I'll have to remove air cleaner to access the A/C service ports. And I could borrow a set of gauges.

My main question today is: Where is the low press. switch? Under the air cleaner, or where?

"If it ain't got fins, it ain't a real car !


Site Ambassador
Posts: 15777

Loc: Baltimore, MD
Reg: 11-27-04
06-12-18 07:15 PM - Post#2736772    
    In response to KOOL57

Not sure exactly where your switch is, but since the system is a closed circuit, just follow your lines around the engine bay. Sometimes the switch is in the condenser, sometimes near or on the dryer and sometimes on the hard lines.

Friends don’t let friends drive Fords.

1999 Silverado Z71 4X4 extra-cab short bed
1983 Malibu Fauxmad - tubbed
1978 El Camino Kustomized
1972 Monte Carlo
1957 210 handyman wagon
1957 Nomad sport wagon
1957 Cameo Carrier


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