Will this work with 1234yf refrigerant? And does it have a expansion valve?

it has a expansion valve. I don't know about 1234yf

Does this unit have provisions (Setting) for defrost?

No. its set up with 4 vent outlets. if you wanted you could run a vent outlet to your windshield and blend the hot/cold air to use it as a defrost.

Is this a stand alone unit?

no, this is only about 1/2 of a system. you still need a condenser core and a compresser

Can you post the link to the instruction manual download?

Here is the link. https://m.media-amazon.com/images/I/81415X7Xf+L.pdf

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A/C Air Conditioning Evaporator Kit 12V Universal Under Dash AC Evaporator Underdash Heating Cooling Unit 3 Speed for Car Truck A/C Air Conditioner Evaporator Assembly

A/C Air Conditioning Evaporator Kit 12V Universal Under Dash AC Evaporator Underdash Heating Cooling Unit 3 Speed for Car Truck A/C Air Conditioner Evaporator Assembly

Product ID: 539742770

⚡12V power efficiency

🌬️3-speed airflow control

🛠️Universal direct-fit design

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Description

🌬️ Upgrade your ride’s climate game — because comfort is the new status symbol.

DURABLE ABS HOUSING - Corrosion and wear-resistant casing built to last through all seasons.
OPTIMIZED COOLING POWER - Delivers 137 BTU cooling capacity with max airflow of 880 ft/min for rapid temperature regulation.
UNIVERSAL COMPATIBILITY - Seamlessly upgrade classic cars, trucks, and heavy equipment with a direct replacement fit.
COMPLETE INSTALLATION KIT - Includes expansion valve, thermostat, mounting brackets, drain hose, and T-tube for hassle-free setup.
PRECISION CLIMATE CONTROL - Adjust between 3 wind speeds for personalized comfort on every drive.

This 12V universal under-dash A/C evaporator kit features a rugged ABS plastic housing and a 3-speed blower switch, delivering up to 137 BTU cooling capacity and 880 ft/min airflow. Designed for easy direct replacement, it’s ideal for adding or upgrading air conditioning in classic cars, trucks, and heavy machinery. The kit includes all necessary installation accessories, ensuring a professional-grade climate upgrade that blends durability with customizable comfort.

Specifications

Amperage	8 A
Asin	B0BGCPJQYL
Best Sellers Rank	#605,725 in Automotive (See Top 100 in Automotive) #180 in Automotive Replacement Air Conditioning Core Assemblies
Brand	Gdrasuya10
Customer Reviews	5.0 5.0 out of 5 stars (1) 5.0 out of 5 stars
Date First Available	September 24, 2022
Exterior	Smooth
Item Model Number	BEU-404-100
Item Weight	9 pounds
Manufacturer	LianDu-US
Manufacturer Part Number	BEU-404-100
Mirror Adjustment	Power
Model	Universal AC Evaporator
Oem Part Number	BEU-404-100
Product Dimensions	16 x 13 x 6 inches
Special Features	3 speed control switch
Voltage	12 volts
Wattage	30 watts

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HK$1801

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