Four Seasons 38811 A/C Expansion Valve - Rear
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Four Seasons
 Expansion Valve

Four Seasons 38811 A/C Expansion Valve - Rear

Brand Four Seasons 38811
Position Rear
Color Aluminum
Description Expansion Valves
Liquid Inlet Fitting Gender Female
Liquid Inlet Fitting Thread Diameter No. 6
Liquid Inlet Size IN 0.430
Liquid Inlet Size MM 10.8
Liquid Inlet Style Dual O-Ring
Liquid Inlet Thread Type Not Threaded
Liquid Inlet Type O-Ring
Liquid Outlet Fitting Gender Female
Liquid Outlet Fitting Thread Diameter No. 8
Liquid Outlet Style O-Ring
Liquid Outlet Thread Type Not Threaded
Liquid Outlet Type O-Ring
Lqd Out Size IN 0.550
Lqd Out Size MM 14.000
Material Aluminum
Meets / Exceeds OEM? Yes
Mounting Hole Quantity 2
O-Ring A Number/Desc [24511] / O-Ring Kit
O-Ring B Number/Desc [24138] / Gasket
O-Ring C Number/Desc [24149] / Gasket
O-Ring D Number/Desc [24167] / Green O-Ring
O-Ring E Number/Desc [24632] / Green O-Ring
O-Ring F Number/Desc [24633] / Green O-Ring
Refrigerant Type R134A
Style w/o Solenoid
Suc In Size IN 0.8
Suc In Size MM 20.4
Suc Out Size IN 0.8
Suc Out Size MM 20.3
Suction Inlet Fitting Gender Female
Suction Inlet Fitting Thread Diameter No. 12
Suction Inlet Style O-Ring
Suction Inlet Thread Type Not Threaded
Suction Inlet Type O-Ring
Suction Outlet Fitting Gender Female
Suction Outlet Fitting Thread Diameter No. 12
Suction Outlet Style Dual O-Ring
Suction Outlet Thread Type Not Threaded
Suction Outlet Type O-Ring
Super Heat 7.000
Switch Included? Not Included
Tonnage 1.000
Type Block Type
Product line Expansion Valve
Fits Chrysler, Dodge, and Plymouth · 35 vehicles

OE direct replacement. Meets or exceeds OEM requirements for dependable A/C flow control.

Aluminum construction. Lightweight material resists corrosion in demanding HVAC service.

Block type design. Uses O-ring connections for a secure, leak-resistant seal.

Cross-references AMS Automotive 4633, Bosch 17211 and Dorman - HELP 91083 for the same application. See all 35.

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Four Seasons 38811 Expansion Valve

The Four Seasons 38811 A/C expansion valve is a block-type HVAC flow restrictor built for R134A systems. It is an aluminum replacement that meets or exceeds OEM requirements and is specified with a 7.0 super heat setting for controlled refrigerant metering in rear air conditioning applications.

Key Features

  • Four Seasons Expansion Valve line, part number 38811
  • Block-type A/C expansion valve for R134A refrigerant
  • Aluminum construction with aluminum finish
  • Female suction and liquid fittings with O-ring sealing
  • Dual O-ring inlet and O-ring outlet styles for secure sealing
  • Meets or exceeds OEM specifications
  • Rear HVAC application for Chrysler, Dodge, and Plymouth minivans

Product Details

Four Seasons 38811 is an A/C expansion valve used to regulate refrigerant flow into the evaporator on rear HVAC systems. This block-style valve is designed for R134A service and uses female suction and liquid connections with O-ring sealing surfaces for proper refrigerant control. The valve is listed for rear installation on 1990-1995 Chrysler Town & Country, 1995 Chrysler Grand Voyager, 1995 Chrysler Voyager, 1990-1995 Dodge Caravan, 1990-1995 Dodge Grand Caravan, 1990-1995 Plymouth Grand Voyager, and 1990-1995 Plymouth Voyager. If you are replacing a rear A/C expansion valve on a Chrysler Voyager or Dodge Caravan, Four Seasons 38811 provides the correct OE-style configuration for these applications.

This part cross-references Bosch 17211 for the same application.

What It Helps Fix

  • Rear A/C vents blowing warm air
  • Erratic evaporator refrigerant metering
  • Loss of cooling performance in the rear HVAC circuit
  • Refrigerant flow restriction caused by a worn valve
  • Seal-related leaks at the expansion valve connections

Installation Notes and Tips

Verify the vehicle uses an R134A rear HVAC setup before ordering. Match the block-type valve, female fitting layout, and O-ring connection style to the original part. Replace any disturbed O-rings and confirm the system is evacuated, leak-checked, and recharged to specification after installation. For 1990-1995 Dodge Caravan and related Chrysler/Plymouth rear A/C service, confirm the valve orientation and line sizes before assembly.

Quality Assurance

Four Seasons 38811 is built to meet or exceed OEM requirements for the listed rear A/C applications. The Four Seasons Expansion Valve line is used for replacement service where accurate refrigerant control and OE-style fitment are required.

Related reading

This part fits 35 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
1995ChryslerGrand Voyager——RearExpansion Valve
1995ChryslerTown & Country——RearExpansion Valve
1995ChryslerVoyager——RearExpansion Valve
1995DodgeCaravan——RearExpansion Valve
1995DodgeGrand Caravan——RearExpansion Valve
1995PlymouthGrand Voyager——RearExpansion Valve
1995PlymouthVoyager——RearExpansion Valve
1994ChryslerTown & Country——RearExpansion Valve
1994DodgeCaravan——RearExpansion Valve
1994DodgeGrand Caravan——RearExpansion Valve
1994PlymouthGrand Voyager——RearExpansion Valve
1994PlymouthVoyager——RearExpansion Valve
1993ChryslerTown & Country——RearExpansion Valve
1993DodgeCaravan——RearExpansion Valve
1993DodgeGrand Caravan——RearExpansion Valve
1993PlymouthGrand Voyager——RearExpansion Valve
1993PlymouthVoyager——RearExpansion Valve
1992ChryslerTown & Country——RearExpansion Valve
1992DodgeCaravan——RearExpansion Valve
1992DodgeGrand Caravan——RearExpansion Valve
1992PlymouthGrand Voyager——RearExpansion Valve
1992PlymouthVoyager——RearExpansion Valve
1991ChryslerTown & Country——RearExpansion Valve
1991DodgeCaravan——RearExpansion Valve
1991DodgeGrand Caravan——RearExpansion Valve
1991PlymouthGrand Voyager——RearExpansion Valve
1991PlymouthVoyager——RearExpansion Valve
1990ChryslerTown & Country——RearExpansion Valve
1990DodgeCaravan3.3LV6RearExpansion Valve
1990DodgeCaravan2.5LL4RearExpansion Valve
1990DodgeCaravan3.0LV6RearExpansion Valve
1990DodgeGrand Caravan——RearExpansion Valve
1990PlymouthGrand Voyager——RearExpansion Valve
1990PlymouthVoyager2.5LL4RearExpansion Valve
1990PlymouthVoyager3.0LV6RearExpansion Valve
Directly replaces or cross-references 35 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
AMS Automotive — 4633Bosch — 17211Dorman - HELP — 91083Four Seasons — 38811UAC — EX9419C1557631800151822522073642082523021223043167588110146610031309083130908AM3411276375881141929714462228464418646770444796898713881111138811V1918980488919520A9908AC3105AC3105CCWK758811EX9419FE252MT5542T38811