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Old 05-16-2019, 04:01 PM   #1
JimGunther
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Default Refrigerant Temp Sensor - replacement part??

Think my temp sensor (the one near the firewall) was bad (well, it is NOW anyway) and can't find replacement anywhere. GM dealer says original part # is 10398971 ....Anybody have experience with an alternative...that works? TIA, Jim

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Old 05-16-2019, 05:51 PM   #2
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2003 L-Series 3.0L Sedan
Default Re: Refrigerant Temp Sensor - replacement part??

Just a guess here. Ac temperature sensors are in various places - mounted on compressors, next to the ac lines/thermal expansion valve on the firewall and on auto climate control panels to measure cabin temps to regulate temps to selected values.

A two wire temperature sensor on the txv block/ac lines will have thermal grease for heat transfer. This tends to dry out and harden. Usually white in appearance. If you're certain this is damaged. There are two ways to consider repairs. Replace it with a new one or search for cross references to other GM models using the same sensor or either leaving this connection as is or short the two terminals together. I'd have to study service manual wiring and descriptions to determine if leaving this connection open or shorting the two terminals bypasses this sensor to allow ac use without compromising the system. Junk yard Vues are a source of perfectly good parts.

Used in measuring thermal expansion valve temperatures, it helps prevents freezing conditions occurring by sending signals to disable compressor operation. This allows a freezing condition to warm up the txv then allow ac use. Freezing conditions at the txv would be considered around 32F/0C. If freezing occurs at the txv, the evaporator coils will freeze moisture from airflow, building up ice until the evaporator becomes an ice block with zero airflow. This rarely occurs in normal ac use. Conditions allowing freezing conditions would be losing refrigerant from a leak, contamination from uninformed diyers using refill kits with sealer, incorrect repairs to ac without using refrigeration equipment to evacuatea system of air and moisture prior to refilling a repeated system, etc. Vues do not cycle ac compressors on and off during ac use.

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Old 05-17-2019, 08:46 AM   #3
JimGunther
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Default Re: Refrigerant Temp Sensor - replacement part??

trying to post photo of the part in question.
One of the two wire is broken.

Mechanic tells me, this is the sensor that tells the AC Clutch to engage

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Old 05-17-2019, 12:38 PM   #4
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Default Re: Refrigerant Temp Sensor - replacement part??

Snapshots from digital cameras or cellphones create vey large image files, several megabytes per image. This site restricts attachments to 150kb so an error message or nothing occurs. Resizing images is required to less than a megabyte and preferably in jpeg format for acceptance. You can open a photo album and add images without resizing but will have to add a link or setup to point to your photo album. Your choice.

If one of the two wires separated, can it be soldered together or add a bit of wire to bridge the gap?

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