Cold Advance Thermostatic Switch For HMMWV HUMVEE – Replaces 12338596, PB-HEP8596

If you’re working on a HMMWV or HUMVEE and need a cold advance thermostatic switch, this is the one.

It’s a direct replacement—just plug it in and get back to business.

Interchanges with OEM 12338596 and NSN 5930-01-183-6637.

Manufacturer part number is PB-HEP8596.

It’s unbranded but meets the specs you need.

Brand new in the package, with a 30-day warranty.

Fitment is direct, and it’s non-domestic product?

Unknown origin, but it’s ready to go.

Whether you’re maintaining a military rig or a civilian surplus vehicle, this switch helps manage engine timing in cold conditions.

Don’t let a bad switch leave you stranded.

Swap it out and keep that diesel running right.