Four Seasons HVAC Pressure Switch P/N:36646
Keep your A/C compressor protected from dangerous high-side pressure with the Four Seasons HVAC Pressure Switch 35825, a system-mounted high cut-out pressure switch that reads refrigerant pressure and opens the circuit to disengage the compressor clutch when pressure climbs too high. It's a direct-fit replacement for a wide range of heavy trucks, including the 1997-2005 Freightliner Century Class, 1994-2003 Freightliner FL70, 1990-1992 International 4700, 1985-2003 Kenworth K100E, 1987-2014 Kenworth T800, and 1990-2000 Mack CH — see the Buyer's Guide tab for the full list of 106 applications.
Backed by over 50 years of Four Seasons mobile A/C experience, this switch is engineered and tested for reliable operation. If a failed high cut-out pressure switch is the cause of a compressor that won't cycle or an A/C system that trips off, this replaces it. Diagnose the cause before replacing, and confirm the fit for your vehicle in the Buyer's Guide.
What does this pressure switch do?
It reads refrigerant pressure and opens the circuit to disengage the compressor clutch when system pressure climbs too high, helping protect the A/C system from excessive high-side pressure.
Does it come with seals?
Yes. It contains the gaskets, o-rings, or seals needed to properly replace the product.
Is it corrosion resistant?
It is zinc coated to help resist corrosion.
Will this fit my truck?
It's built for vehicle-specific applications and fits 106 listed heavy-truck applications across Freightliner, International, Kenworth, and Mack. Check the Buyer's Guide tab to confirm your exact vehicle.
Why is my A/C compressor not cycling?
A compressor that won't engage can have several causes. If a failed high cut-out pressure switch is the cause, this part replaces it—diagnose the system before installing.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.