Four Seasons A/C Expansion Valve 38878
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Four Seasons A/C Expansion Valve 38878
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Four Seasons A/C Expansion Valve P/N:38878

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$38.99
MPN: 38878
Item Package Quantity: 1
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Four Seasons A/C Expansion Valve P/N:38878
Four Seasons A/C Expansion Valve P/N:38878
$38.99

Meter the flow of liquid R134A refrigerant into the evaporator with the Four Seasons Block Type A/C Expansion Valve 38878. It drops in as a direct-fit replacement across a wide range of heavy-duty trucks — including the 1981-1988 AUTOCAR ACL, 2002 AUTOCAR LLC. XPEDITOR WX, 1980-1985 FORD L800, 1981-1993 FORD L9000, and 1994-1996 FREIGHTLINER FL60 — spanning 161 applications in all; see the Buyer's Guide tab for the full list.

  • Block-type design: aluminum body with precision-machined ports.
  • Calibrated metering: tuned for cabin comfort, rated at 1.5 tons with 5° superheat.
  • Seals included: ships with the O-rings needed for an application-specific replacement (O-rings 24606, 24608, and 24610).
  • OE-level build: engineered to meet or exceed OE fit, form, and function for R134A systems.

This is a block-type valve without a solenoid, and mounting hardware is not included — consult the vehicle service information for the correct fasteners. Signs the original expansion valve may need replacing include weak cooling, frosting at the evaporator or valve, or inconsistent vent temperatures; if a failed expansion valve is the cause, this unit replaces it.

Manufacturer part number 38878.

Frequently Asked Questions

What does this expansion valve do?

It meters the flow of liquid R134A refrigerant into the evaporator, regulating refrigerant flow to control cooling in the A/C system.

Does this valve include a solenoid?

No. This is a block-type expansion valve supplied without a solenoid, per the manufacturer's w/o Solenoid designation.

Which refrigerant is it designed for?

It is designed for R134A A/C systems, with an aluminum body and precision-machined ports.

Are O-rings or mounting hardware included?

O-rings 24606, 24608, and 24610 are included for an application-specific replacement. Mounting hardware is not included; consult the service information for the correct fasteners.

Will this fit my truck?

It covers 161 heavy-truck applications across Autocar, Ford, and Freightliner models. Check the Buyer's Guide tab to confirm your exact year and model.

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