Four Seasons A/C Expansion Valve 38728
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Four Seasons A/C Expansion Valve 38728
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Four Seasons A/C Expansion Valve P/N:38728

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$37.99
MPN: 38728
Item Package Quantity: 1
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Four Seasons A/C Expansion Valve P/N:38728
Four Seasons A/C Expansion Valve P/N:38728
$37.99

Keep refrigerant flowing to the evaporator with the Four Seasons A/C Expansion Valve 38728. This expansion valve serves as a direct-fit replacement across a wide range of medium- and heavy-duty trucks, including the 1990-1995 International 4600, 1990-2000 International 4700, 1990-2000 International 4800 and 4900, 1990-2000 International 9300 and 9400, and the 1990-1993 Mack MH — 43 applications in all (see the Buyer's Guide tab for the complete list).

The A/C expansion valve meters the flow of high-pressure liquid refrigerant into the evaporator, dropping its pressure and regulating how much refrigerant enters based on the system's cooling demand. Proper metering is what lets the evaporator absorb heat efficiently.

  • Metering function: Controls the flow of liquid refrigerant into the evaporator core.
  • Direct-fit replacement: Designed to install on the listed applications.
  • Common failure signs: Weak or inconsistent cooling, evaporator frosting, or erratic system pressures can be signs the expansion valve may need replacing — diagnose the cause before replacing.

If a stuck or failed expansion valve is behind your poor A/C performance, this unit replaces it. Manufacturer part number 38728.

Frequently Asked Questions

What does an A/C expansion valve do?

It meters high-pressure liquid refrigerant into the evaporator, lowering its pressure and regulating flow based on cooling demand so the evaporator can absorb heat efficiently.

Will this fit my truck?

It is a direct-fit replacement for 43 applications, including the 1990-2000 International 4700, 4800, 4900, 9300, 9400 and the 1990-1993 Mack MH. Check the Buyer's Guide tab for the full list.

What are the signs of a failing expansion valve?

Weak or inconsistent cooling, evaporator frosting, or erratic system pressures may indicate a faulty expansion valve. Diagnose the cause before replacing, as other components can cause similar symptoms.

What is the manufacturer part number?

This is Four Seasons manufacturer part number 38728, an A/C expansion valve.

Should the system be serviced when replacing this valve?

Follow the vehicle service procedure for evacuating and recharging the A/C system; consult the service information for the correct refrigerant type and charge amount.

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