HomeHVAC > Hoses and PipesFour Seasons 66559 A/C Refrigerant Suction Hose
Part #: 66559

Four Seasons 66559 A/C Refrigerant Suction Hose

Hose Assembly
⚙️ 11 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$45.39Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
📦Hose Assembly
🚗Fitment: Ford, F-250 Super Duty and F-350 Super Duty
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Four Seasons Hose Assembly 66559

The Four Seasons Hose Assembly 66559 is designed specifically for Ford F-250 Super Duty and F-350 Super Duty models. This A/C refrigerant suction hose ensures reliable low-pressure refrigerant flow within your vehicle's HVAC system, maintaining optimal air conditioning performance.

  • Constructed from durable aluminum and rubber materials
  • Equipped with P-nut fittings on both ends for secure connections
  • Compatible with R134-a refrigerant systems
  • Includes gasket and fittings for proper sealing and installation
  • Features an integrated muffler to reduce noise
  • OE replacement part ensuring direct fit and function
  • Includes one service port sized at 13 mm for maintenance access

Detailed Product Description

The Four Seasons Hose Assembly 66559 belongs to the Hose Assembly product line, which focuses on delivering reliable and precise HVAC hose and pipe solutions. This line is engineered to meet or exceed original equipment specifications, providing a direct replacement for factory parts. The 66559 suction hose is constructed from a combination of aluminum and rubber, offering durability and flexibility necessary for the low-pressure side of the air conditioning system. Both ends feature P-nut fittings, facilitating a secure and leak-free connection. The hose is designed for use with R134-a refrigerant, the standard for many modern vehicles, including Ford Super Duty trucks.

Applications and Problem Solving

  • Restores proper refrigerant flow in the A/C suction line
  • Eliminates leaks caused by worn or damaged hoses
  • Reduces A/C system noise with built-in muffler
  • Prevents contamination with included sealing washers and O-rings
  • Supports maintenance with an integrated service port

Installation Notes and Tips

When installing the Four Seasons Hose Assembly 66559 on Ford F-250 Super Duty or F-350 Super Duty models, ensure all old seals and fittings are removed and surfaces are clean. The included gasket and O-rings should be replaced to maintain a proper seal. Tighten P-nut fittings to manufacturer torque specifications to avoid leaks. The service port allows for easy refrigerant charging and system diagnostics without hose removal.

Quality Assurance and Warranty

This Four Seasons Hose Assembly 66559 is an OE replacement part, designed to meet original equipment standards for fit, form, and function. It includes all necessary fittings and seals to ensure a reliable installation. While specific warranty details are not provided, Four Seasons products typically come with a limited warranty against defects in materials and workmanship.

BrandFour Seasons
Part Number66559
PositionHose Assembly
Bracket?w/o Bracket
Component TypeSuction Line
DescriptionHose Assemblies
End 1 TypeP-Nut Fitting
End 2 TypeP-Nut Fitting
Fittings IncludedIncluded
Friction Material Attachmentw/o Switch Port
Gasket Or Seal IncludedIncluded
MaterialAluminum / Rubber
Muffler?w/ Muffler
O-Ring A Number/Desc[24243] / Tear Drop Sealing Washer
O-Ring B Number/Desc[24258]
O.E. Replacement?Yes
Refrigerant TypeR134-A
Service Port Qty1
Service Port Size13 mm
Service Port?w/ Service Port
Suction End TypeP-Nut Fitting
Sve Port Low SideLow Side
Switch Included?Not Included
System PressureLow Pressure

This part fits 11 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersPositionNotes
2019FordF-250 Super Duty6.7LV8N/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2019FordF-350 Super Duty6.7LV8N/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2018FordF-250 Super Duty6.7LV8N/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2018FordF-350 Super Duty6.7LV8N/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2017FordF-250 Super Duty6.7LV8N/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2017FordF-250 Super DutyPlatinum6.7LV8N/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2017FordF-250 Super DutyXL6.7LV8N/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2017FordF-250 Super DutyXLT6.7LV8N/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2017FordF-250 Super DutyKing Ranch6.7LV8N/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2017FordF-250 Super DutyLariat6.7LV8N/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2017FordF-350 Super Duty6.7LV8N/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

21147066559785847A83077HA113644CHC3Z19867AYF37584

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.