How does my vehicle’s AC system work?

The AC compressor pressurizes refrigerant gas, which moves to the condenser. The gas releases heat, condensing into a high-pressure liquid. After cooling, the liquid passes over evaporator coils to cool the air as it is blown through the vents.

What are the signs the system needs service?

Common indicators of an air conditioning system in need of service include warm and/or weak airflow through the vents, frequent on/off cycling of the system and a strange or musty odor.

Is the puddle of water under my car a sign of AC problems?

Not necessarily. Condensation typically builds up on the AC evaporator and the water is drained at the bottom of the vehicle. That’s normal, but a larger puddle combined with reduced AC performance could indicate a problem.

Does low refrigerant mean there’s a leak in the system?

In most cases the answer is yes. AC systems in older cars will experience refrigerant leakage over time, but a later-model vehicle that needs continual refrigerant recharging typically indicates a leak.

Can a new cabin air filter improve AC performance?

Yes. A very dirty or clogged cabin air filter can reduce the airflow of the AC system, reducing its cooling efficiency and making the system work harder than normal. Periodic cabin filter replacements help the AC system keep its cool.

ASIN	B01IU5GOW4
Best Sellers Rank	#223,437 in Automotive ( See Top 100 in Automotive ) #42 in Automotive Replacement Expansion Valves & Parts #72 in Automotive Replacement Air Conditioning Valves
Brand	GM GENUINE PARTS
Brand Name	GM GENUINE PARTS
Connector Type	Stud and Bolt
Customer Reviews	4.7 out of 5 stars 18 Reviews
Exterior Finish	Aluminum
Global Trade Identification Number	00808709536000
Inlet Connection Type	Flare or Compression
Item Dimensions	8 x 8 x 1 inches
Item Weight	0.5 Pounds
Item dimensions L x W x H	8 x 8 x 1 inches
Manufacturer	ACDelco
Manufacturer Warranty Description	24 Month / Unlimited Mile Limited Warranty on parts sold on or after 04/01/18. (Parts Only) Please see ACDelco.com for more details.
Material	Brass , Steel, or Aluminum
Material Type	Brass, Steel, or Aluminum
Model Number	15-51369
Number of Ports	2
Outlet Connection Type	Flare or Compression
Size	8 inches x 8 inches x 1 inch
Specification Met	oe
Thread Size	8 inches
Thread Type	Stud and Bolt
UPC	808709536000
Unit Count	1 Count
Valve Type	Expansion Valve

GM Genuine Parts 15-51369 (84104355) Air Conditioning Thermal Expansion Valve Kit with Evaporator Seals, Valve, Stud, and Bolts

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