Replacement of the heat pump assembly on a 2024 Tesla Cybertruck Tri-Motor Cyberbeast. This is a PROFESSIONAL-ONLY procedure — the heat pump is integrated with Tesla's combined battery/motor/cabin thermal loop and requires Tesla Toolbox software to safely depressurize the battery cooling circuit before any line is opened. Battery coolant should also be inspected per Tesla's 4-year / 50,000 mi recommendation when this work is performed.

Warnings

Tools required

Parts

• Heat pump assembly (Cybertruck-specific) × 1 — Manufacturer-specified Cybertruck heat pump assembly — refer to Tesla EPC
• Coolant line O-rings / seal kit × 1 — OEM seal kit for heat pump coolant ports
• Refrigerant line gaskets / sealing washers × 1 — OEM HVAC line seal kit
• Hose clamps (single-use spring or constant-tension type, as applicable) × 4 — OEM-equivalent replacement clamps

Fluids

• Tesla Battery/Motor Coolant (G-48) — 10 qt
• R-1234yf refrigerant (charge per underhood label)
• PAG/POE refrigerant oil (per Tesla spec for electric A/C compressors)

Preparation

1. Park on level ground, place in P, and engage the parking brake.
2. Exit ALL doors with the key fob carried away from the vehicle. Wait at least 2 minutes for HV systems to fully de-energize, even on this non-HV job.
3. Disconnect the 48V low-voltage battery (Cybertruck-specific — NOT 12V). Confirm the correct disconnect procedure in Toolbox; some 48V systems require a software-commanded shutdown before physical disconnect.
4. DO NOT touch, cut, or pierce ANY orange cable — these are high-voltage and lethal on this 800V system.
5. If at any point you encounter an orange cable, an HV component, or are unsure if a system is de-energized: STOP and consult a Tesla-certified technician.
6. Connect Tesla Toolbox 3 and run the thermal-system depressurization / service routine. This evacuates trapped pressure from the battery loop and isolates the battery cooling circuit from the cabin/PT loops via the octovalve. Do not proceed until Toolbox confirms the system is safe to open.
7. Place vehicle in Jack/Service Mode to disable air suspension self-leveling.
8. Recover all R-1234yf refrigerant using an approved recovery machine. Record the recovered weight and oil volume.
9. Raise the vehicle on a lift rated for Cybertruck weight, using Tesla-specified lift points only.
10. Remove the frunk tub and any underhood covers required to access the heat pump assembly, per service manual.
11. Have a coolant catch pan staged before any line is opened — expect up to 10 qt of coolant loss from the affected loop.

Procedure

1. 1

   Verify thermal system is safe to open
   With Toolbox connected, confirm the depressurization routine completed successfully and the octovalve is in service position. Verify refrigerant has been fully recovered (manifold reads 0 psi static). Do NOT proceed if either condition is not met.
   ⚠️Opening the loop with residual pressure can spray hot coolant into the HV battery enclosure. HV battery damage exceeds $15,000+ to replace and coolant intrusion can cause arc faults.
2. 2

   Remove access panels and underhood trim
   Remove the frunk liner, cowl trim, and any heat-pump access cover. Retain fasteners. Use non-marring trim tools — stainless exoskeleton panels show pry marks permanently.
   ⚠Do not strike or hammer panels — Cybertruck stainless cannot be straightened like aluminum or steel body panels.
   Torque spec

   Cover Screws11 Nm (8 lb-ft)
3. 3

   Document and label all connections
   Photograph and tag every coolant line, refrigerant line, and electrical connector at the heat pump. The Cybertruck heat pump has multiple coolant ports tied to different loops (battery, powertrain, cabin) — mis-routing on reassembly will cause thermal faults and possible HV battery overheat.
4. 4

   Disconnect electrical connectors at the heat pump
   Release the locking tabs on each connector (signal harness, compressor, valve actuators, and any temperature/pressure sensors integrated into the assembly). Inspect connector seals; replace if damaged.
   ⚠48V connectors may look like legacy 12V Tesla connectors but are NOT cross-compatible. Do not force-mate.
   Torque spec

   Sensor Bolts11 Nm (8 lb-ft)
5. 5

   Drain affected coolant loop
   Position the catch pan. Open the lowest coolant fitting on the heat pump first, allowing the isolated loop to drain. Capture coolant for proper disposal — Tesla G-48 coolant must not be mixed with conventional OAT/HOAT coolants.
   ⚠️If coolant level drops in the HV battery loop unexpectedly or you see coolant near orange cabling, STOP. Coolant contacting HV components can damage the ~$15,000+ HV battery and create a shock/arc hazard.
6. 6

   Disconnect coolant lines from the heat pump
   Using the appropriate quick-disconnect release tool, separate each coolant line. Cap every open port immediately with clean plugs to prevent contamination and to keep the battery loop sealed. Replace single-use clamps where used.
   ⚠️Any debris that enters the battery cooling circuit can clog the battery cold plate and cause thermal runaway risk. Cap ports immediately. HV battery replacement is $15,000+.
   Torque spec

   Coolant Line Fittings15 Nm (11 lb-ft)

   Hose Clamps3 Nm (2 lb-ft)
7. 7

   Disconnect refrigerant lines
   With recovery confirmed, remove the refrigerant line fittings at the heat pump. Discard sealing washers/O-rings — do not reuse. Cap all open refrigerant ports.
   ⚠Even after recovery, residual oil may weep from fittings. Wipe immediately and keep away from electrical connectors.
   Torque spec

   Mounting Bolts27 Nm (20 lb-ft)
8. 8

   Remove the heat pump assembly
   Support the assembly, then remove the bracket and mounting bolts securing the heat pump to the chassis. Lower the unit carefully — assemblies are heavier than they appear due to integrated valves and the electric compressor.
   ⚠️Do not allow the assembly to swing into HV cabling, the front drive unit harness, or the battery enclosure. Impact damage to HV components can render the vehicle unsafe and cause $15,000+ damage.
   Torque spec

   Bracket Bolts20 Nm (15 lb-ft)

   Mounting Bolts27 Nm (20 lb-ft)
9. 9

   Transfer or replace components on the new heat pump
   If the replacement assembly does not come complete with sensors, brackets, or valve actuators, transfer them from the old unit per the manufacturer-specified procedure. Use new O-rings and seals throughout.
   Torque spec

   Sensor Bolts11 Nm (8 lb-ft)

   Bracket Bolts20 Nm (15 lb-ft)
10. 10

    Install the new heat pump assembly
    Lift the new assembly into position and start all mounting bolts by hand before final torque. Confirm no harnesses or coolant lines are pinched between the unit and chassis.
    Torque spec

    Mounting Bolts27 Nm (20 lb-ft)

    Bracket Bolts20 Nm (15 lb-ft)
11. 11

    Reconnect coolant lines with new seals
    Install new O-rings on each coolant fitting. Reconnect lines per your earlier labeling. Verify each quick-connect is fully latched (audible click and pull-test). Install new hose clamps where applicable.
    ⚠️A coolant fitting that pops loose under pressure can spray onto the HV battery vent and HV connectors. Verify every connection. HV battery damage from coolant intrusion is $15,000+.
    Torque spec

    Coolant Line Fittings15 Nm (11 lb-ft)

    Hose Clamps3 Nm (2 lb-ft)
12. 12

    Reconnect refrigerant lines with new seals
    Install new sealing washers/O-rings, lubricated with the correct refrigerant oil. Torque to OEM specification — refer to Tesla Service Manual for refrigerant fitting torque (do not guess; over-torque crushes the seal).
13. 13

    Reconnect electrical connectors
    Reseat each connector until the lock engages. Confirm no pins are bent and no seals are pinched.
14. 14

    Refill and bleed the coolant system via Toolbox
    Reconnect the 48V low-voltage battery. With Toolbox, run the coolant fill/bleed routine. Add Tesla G-48 coolant as the routine requests, up to ~10 qt for the affected loop. Toolbox cycles the octovalve and pumps to purge air from the battery, powertrain, and cabin loops in sequence — manual bleeding is not sufficient.
    ⚠️Air pockets in the battery cooling loop can cause localized overheating of cells. Do NOT skip the Toolbox-driven bleed. HV battery damage is $15,000+.
15. 15

    Evacuate and recharge refrigerant
    Pull a deep vacuum on the A/C side and hold per service spec to verify no leaks. Charge with R-1234yf to the weight specified on the underhood label, plus the oil volume recorded during recovery (or per service bulletin if the heat pump is new).

Reassembly

1. Reinstall any covers, the frunk liner, and cowl trim. Torque cover screws to spec.
2. Exit Jack/Service Mode and allow air suspension to re-level.
3. Clear any DTCs in Toolbox and run the thermal system self-test.
4. Dispose of recovered refrigerant, used coolant, and old seals per local hazardous-waste regulations.

Verification

• Toolbox thermal self-test passes with no active DTCs related to coolant pressure, octovalve position, refrigerant pressure, or compressor.
• Cabin HVAC produces both heat and A/C at expected setpoints; observe coolant and refrigerant temperatures in Toolbox live data during a 10–15 minute drive cycle.
• Verify battery coolant inlet/outlet delta-T is within Tesla service spec under load — abnormal delta-T indicates trapped air or a mis-routed line.
• Inspect all coolant and refrigerant fittings for weeping after the test drive.
• Confirm coolant reservoir level remains stable after multiple heat-cool cycles.
• Note in service records: per Tesla's current guidance, battery coolant should be inspected every 4 years / 50,000 mi; cabin air filter every 2 years; brake fluid every 2 years — advise the owner of any that are due.

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