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#1
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Heat sensor switch on a/c - is that a ground?
82 240D W123
The heat sensor switch on the a/c receiver-drier that turns on the auxiliary fan to cool the a/c condenser. Does that just connect the circuit when hot and disconnect when cold? It's just a ground wire connection for the circuit (or relay circuit), isn't it? Part number 0065451424 Jim Last edited by jimmypete; 07-27-2020 at 10:21 PM. Reason: Added photo |
#2
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Looks that way to me but I'll let you decide.
https://www.startekinfo.com/StarTek/outside/12265/disc_2/program/ETM/123%20turbodiesel_2.pdf |
#3
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Quote:
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#4
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The switch you show does indeed complete a ground, thereby activating at 100c the aux fan by way of the aux fan relay. However this switch senses engine coolant temp.
The switch that senses R12/134A temp at the receiver/dryer has 2 connectors to complete the circuit and activates at 62c the aux fan thru the same relay.
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Don't Chrome them; polish them |
#5
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Thank you. I'm gonna have to trace these wires, I've re-rigged it twice lol.
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#6
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Your car may vary. That temp sensor on my 1984 300D has a much smaller screw and 2 terminals. I recall one terminal goes to ground. It is on the coil- side of the fan relay, which you find mounted on the top inner fender driver's side (under plastic cover). A 2nd relay there actuates the AC compressor clutch.
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1984 & 1985 CA 300D's 1964 & 65 Mopar's - Valiant, Dart, Newport 1996 & 2002 Chrysler minivans |
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