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.

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ACDelco 15-74023 GM Original Equipment Heating and Air Conditioning Control Panel with Rear Window Defogger Switch

ACDelco 15-74023 GM Original Equipment Heating and Air Conditioning Control Panel with Rear Window Defogger Switch

Product ID: 76087564

Details

Brand
ACDelco
Circuit Type
parallel
Connector Type
Screw
Contact Type
Normally Open
Item dimensions L x W x H
11.25 x 4.75 x
Material
Plastic

🔧Durable screw terminal connectors

⚙️GM OE spec precision fit

🔥❄️Seamless heating & cooling control

Description

🔥❄️ Master your ride’s climate with GM precision control ⚙️

PRECISION GM OE FIT - Engineered to match your GM vehicle’s original factory specs for flawless integration.
ROBUST BUILD QUALITY - Crafted with copper contacts and screw terminals for long-lasting reliability.
CERTIFIED FRUSTRATION FREE - Easy installation with certified packaging designed to get you back on the road faster.
EFFORTLESS CLIMATE CONTROL - Automatic operation mode ensures your cabin stays perfectly comfortable without hassle.
INTEGRATED REAR DEFOGGER SWITCH - Stay safe and clear with built-in rear window defogger control at your fingertips.

The ACDelco 15-74023 Heating and Air Conditioning Control Panel is a GM-recommended OEM replacement designed to restore full HVAC functionality in GM vehicles. Featuring automatic operation, durable copper screw terminals, and an integrated rear window defogger switch, it guarantees reliable, factory-grade performance and seamless fitment for a comfortable driving experience.

Specifications

ASIN	B0049481YA
Best Sellers Rank	#3,860,414 in Automotive ( See Top 100 in Automotive ) #4,500 in Automotive Replacement Heater Control Switches
Brand Name	ACDelco
Circuit Type	parallel
Color	Black
Compatible Devices	GM vehicles
Compatible with Vehicle Type	GM vehicles
Connectivity Protocol	X-10
Connector Type	Screw Terminals
Contact Material	Copper
Contact Type	Normally Open
Control Method	Touch
Control Type	Manual
Customer Reviews	4.3 4.3 out of 5 stars (77)
Global Trade Identification Number	00707773612194
Included Components	Heating and A/C Control Panel
International Protection Rating	IP00
Item Dimensions	11.25 x 4.75 x 4.75 inches
Item Type Name	Heating and A/C Control Panel
Item Weight	11.2 ounces
Manufacturer	ACDelco
Material Type	Plastic
Model	15-74023
Mounting Type	Panel Mount
Number of Items	1
Operation Mode	Automatic
Part Number	15-74023
Smart Home Compatibility	Not Smart Home Compatible
Specification Met	certified frustration-free
Switch Type	Temperature Switch
Terminal	Screw
UPC	707773612194
Unit Count	1.0 Count
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.

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