This procedure covers the removal and replacement of the AC hose assembly on a 2011-2014 Ford F-150 with the 5.0L Coyote V8 engine, including refrigerant recovery, line disconnection, and system recharge.

Warnings

Tools required

Parts

• AC hose assembly × 1 — Use OEM specification for specific line being replaced
• AC line O-rings × 1 — Use OEM specification
• R-134a refrigerant × 1 — Use OEM specification
• PAG 46 refrigerant oil × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake
2. Allow engine to cool completely if recently operated
3. Gather all necessary tools and replacement parts
4. Verify the specific AC hose assembly that requires replacement by visual inspection for leaks, damage, or oil residue
5. Connect AC recovery machine and verify it is functioning properly
6. Take photos of routing and connection points before disassembly for reference during reinstallation

Procedure

1. 1

   Recover AC refrigerant
   Connect the AC recovery machine to the service ports (low and high side). Follow the recovery machine manufacturer's instructions to completely evacuate all refrigerant from the system. Verify the system is at 0 PSI before proceeding. Record the amount of refrigerant and oil removed for recharge reference.
   ⚠️Never open AC system under pressure. Ensure complete refrigerant recovery before loosening any fittings.
2. 2

   Access the AC hose assembly
   Depending on which hose assembly is being replaced, remove necessary components for access. For upper hoses near the firewall, no major disassembly is typically needed. For lower hoses or those routing to the condenser, raise and support the vehicle on jack stands and remove the appropriate skid plate or belly pan if equipped. Remove any wire harness clips or brackets securing the hose being replaced.
   ⚠Support vehicle with jack stands if working underneath. Never rely solely on a floor jack.
3. 3

   Disconnect AC line fittings at compressor (if applicable)
   If the hose connects to the compressor, use appropriate wrench to loosen the AC line fittings. Have a drain pan ready to catch residual oil. Remove the bolts or disconnect the spring lock couplings depending on connection type. For spring lock couplings, use the appropriate size disconnect tool to release the coupling before pulling the line free. Cap open ports immediately to prevent moisture and debris entry.
   ⚠Residual refrigerant oil will drain from lines. Have shop towels and drain pan ready.
   Torque spec

   AC Line Fittings20 Nm (15 lb-ft)
4. 4

   Disconnect AC line at condenser or evaporator end
   Locate the opposite end of the hose assembly at the condenser (front of vehicle behind grille) or evaporator (firewall area). Use spring lock coupling disconnect tool or appropriate wrench to separate the connection. For condenser connections, you may need to remove the grille or access through the grille opening. Remove any mounting brackets or clips securing the line to the chassis or body. Cap the open ports immediately.
   Torque spec

   AC Line Fittings20 Nm (15 lb-ft)
5. 5

   Remove hose assembly mounting hardware
   Trace the entire routing path of the hose assembly and remove all mounting bolts, brackets, and clips securing it to the vehicle. Common mounting points include the frame rail, engine bay firewall, and radiator support. Note the exact routing and position of any insulation or protective sleeves for reinstallation.
   Torque spec

   Mounting Bolts34 Nm (25 lb-ft)
6. 6

   Remove old AC hose assembly
   Carefully extract the old hose assembly from the vehicle, noting the routing path through the engine bay. Pay attention to any areas where the hose passes through grommets or heat shields. Remove and inspect all O-rings from the connection points on the vehicle side and discard them.
   ℹ️Take clear photos or notes of exact routing to ensure correct installation of new hose.
7. 7

   Prepare new AC hose assembly
   Unpack the new AC hose assembly and verify it matches the old part exactly. Install new O-rings on all connection points of the new hose assembly. Lubricate all new O-rings with clean PAG 46 refrigerant oil. Add the manufacturer-specified amount of fresh PAG oil into the hose assembly (typically 1-2 oz depending on hose length, consult service manual for exact amount).
   ⚠Use only new O-rings. Never reuse old O-rings as they will leak. Ensure O-rings are properly seated in their grooves.
8. 8

   Route and install new hose assembly
   Route the new hose assembly through the engine bay following the exact path of the original. Ensure the hose does not contact any sharp edges, hot engine components, or moving parts. Install through any grommets or heat shields as original. Verify proper clearance to exhaust manifolds, belts, and pulleys.
   ⚠Ensure hose routing provides adequate clearance from exhaust components and moving parts to prevent damage.
9. 9

   Connect hose at compressor end
   Connect the hose assembly to the compressor using either the spring lock coupling (push firmly until it clicks) or thread the fitting hand-tight first. For threaded fittings, use a wrench to tighten to the specified torque. Ensure the O-ring is properly positioned and not pinched during installation.
   Torque spec

   AC Line Fittings20 Nm (15 lb-ft)
10. 10

    Connect hose at condenser or evaporator end
    Connect the opposite end of the hose assembly to the condenser or evaporator. For spring lock couplings, push together firmly until you hear or feel the coupling engage. For threaded connections, hand-thread first, then torque to specification. Verify both connections are secure and O-rings are not visible (indicating proper seating).
    Torque spec

    AC Line Fittings20 Nm (15 lb-ft)
11. 11

    Install mounting brackets and hardware
    Install all mounting brackets, clips, and fasteners to secure the hose assembly to the vehicle. Ensure the hose is properly supported along its entire length to prevent vibration damage. Torque all mounting bolts to specification. Verify the hose routing does not create any stress or kinks in the line.
    Torque spec

    Mounting Bolts34 Nm (25 lb-ft)
12. 12

    Vacuum and leak test system
    Connect the vacuum pump to the AC system service ports. Evacuate the system to 29+ inches of mercury (Hg) for at least 45 minutes. Close the valves and observe the vacuum gauge for 30 minutes. The vacuum should hold steady, indicating no leaks. If vacuum drops, locate and repair the leak before proceeding.
    ⚠Proper evacuation removes moisture from the system which is critical for AC performance and longevity. Do not skip or rush this step.
13. 13

    Recharge AC system
    Using the AC manifold gauge set and following the charging machine instructions, recharge the system with the correct amount of R-134a refrigerant (refer to underhood label for capacity, typically 1.75-2.0 lbs for F-150). Add refrigerant to both high and low sides as appropriate with engine off, then finish charging on the low side with engine running and AC on MAX. Monitor system pressures throughout charging process.
    ℹ️Do not overcharge the system. Use the vehicle-specific refrigerant capacity from the underhood emissions label.
14. 14

    Test AC system operation
    Start the engine and turn the AC to maximum cooling with the blower on high. Allow the system to run for 10-15 minutes. Monitor the gauge pressures (typical: low side 25-45 PSI, high side 150-250 PSI at ambient 70-80°F). Check for proper compressor engagement and clutch cycling. Verify cold air output at the vents (typically 40-50°F colder than ambient).
    ℹ️System pressures vary with ambient temperature. Refer to pressure-temperature charts for accurate diagnosis.
15. 15

    Final inspection and leak check
    With the system running, visually and physically inspect all connections for signs of leaks (oil residue). Use an electronic leak detector or UV dye to verify no refrigerant leaks at the new hose assembly connections and along the hose length. Reinstall any grilles, skid plates, or panels removed for access. Verify no tools or parts were left in the engine bay.
    ℹ️Even small leaks will eventually cause system failure. Thorough leak checking is essential.

Reassembly

1. Reinstall any skid plates, belly pans, or grille components removed during access
2. Reconnect any wire harness clips or brackets that were moved for access
3. Lower vehicle if raised and perform final underhood inspection
4. Clean up any spilled refrigerant oil from engine bay components

Verification

• Start engine and run AC system on MAX for 15 minutes, verify cold air output at vents
• Check that compressor clutch engages and cycles properly
• Verify system pressures are within normal range using manifold gauges (low side 25-45 PSI, high side 150-250 PSI at 70-80°F ambient)
• Inspect all connections for leaks using electronic leak detector or UV light
• Verify no unusual noises from compressor or hose vibration
• Confirm proper routing with no contact to hot or moving components
• Test AC performance in cab with vent temperature 40-50°F below ambient temperature

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