What is this A/C evaporator valve for?

yjeep

New Member
Joined
Jan 17, 2023
Messages
1
Location
japan
hi

The old evaporator didn't have it.

What is this little valve used for?

GP_4711772 (1).jpeg
 

Flyer58

YJ Enthusiast
Joined
Apr 12, 2020
Messages
723
Location
Magnolia, Texas
If that's a Schrader valve (tire valve) it's used to test the low pressure or suction side of the system or add freon.

After all these years there's a good chance your coil or the one you're replacing has been changed before and either, or both, are aftermarket and might be slightly different to include the valve or not.

Usually the high and low pressure connectors are on the engine side of the firewall. I don't know anything about AC on the YJ or where the valves are located on the original equipment.