2024 Jeep Compass Thermostat Stuck Open TSB 07-006-24

Symptoms of a Stuck Open Thermostat

Owners of a 2024 Jeep Compass experiencing a "thermostat stuck open" condition may notice several key indicators. The most immediate sign is the illumination of the Malfunction Indicator Lamp (MIL) on the dashboard. This warning light is often accompanied by specific diagnostic trouble codes (DTCs) stored in the vehicle's computer system.

Beyond the warning light, drivers might observe that the vehicle's engine runs colder than usual. This can manifest as the engine taking an unusually long time to reach its optimal operating temperature, or never quite getting there. A direct consequence of a cold-running engine is often a lack of adequate heat inside the cabin, making the vehicle uncomfortable, especially in colder climates. These symptoms collectively point towards the engine's cooling system not functioning correctly.

Fault Codes (DTCs)

When a thermostat is stuck open, the vehicle's onboard diagnostic system will typically record a specific fault code. For the 2024 Jeep Compass, the primary diagnostic trouble code associated with this issue is:

Code	Description
P0128-00	Termostato Elétrico - Racionalidade (Thermostat Rationality)

This code indicates that the engine coolant temperature is consistently below the thermostat regulating temperature, suggesting that the thermostat is not closing properly to allow the engine to warm up.

Diagnosis and Trigger Conditions

To accurately diagnose the "2024 Jeep Compass thermostat stuck open" issue, technicians will first confirm the presence of the Malfunction Indicator Lamp (MIL) and the DTC P0128-00. Stellantis Technical Service Bulletin 07-006-24, also released as Rapid Service Update (RSU) 24-112, outlines the diagnostic process.

A key step involves checking if the vehicle's VIN is listed in the VIP system or the RSU VIN list. If the VIN is present, the repair should proceed. However, even if the vehicle is not on the specific RSU list, but exhibits the symptoms described (MIL, P0128-00, cold engine, no cabin heat), the repair procedure detailed in this bulletin is applicable. This ensures that all affected vehicles, regardless of their inclusion in the initial RSU list, can receive the necessary service.

Repair Procedure Summary

The repair for a "2024 Jeep Compass thermostat stuck open" condition, as detailed in TSB 07-006-24, is straightforward: replacing the faulty thermostat. The process involves:

1. Verification: Confirming the vehicle's eligibility for the Rapid Service Update (RSU) or the presence of the specified symptoms and DTC.
2. Thermostat Replacement: The old thermostat is removed, and a new one is installed. This procedure requires referring to the detailed service steps available in the DealerCONNECT Service Library under reference 1088C40, which covers "Valvula termostatica - remocao/recolocacao" (thermostatic valve - removal/replacement), including all necessary associated procedures.
3. Refilling Coolant: After replacing the thermostat, the engine coolant system must be properly refilled and bled to ensure no air pockets remain, using the specified engine coolant.

This repair is estimated to take approximately 0.9 hours of labor.

Required Tools and Parts

To perform the thermostat replacement, specific parts and tools are necessary:

• Thermostat: Part Number 7096849 - SA (includes gasket)
• Engine Coolant: Part Numbers 68723784AA - NA or 68163849AB
• Diagnostic Tool: wiTECH or an equivalent diagnostic system is required for initial diagnosis and potentially for clearing codes after the repair.

Important Warnings

This bulletin applies specifically to vehicles built on and after May 08, 2023 (MDH 0508XX) and on and before May 10, 2024 (MDH 0510XX). Owners should be aware that all repairs related to this TSB are reimbursable within the provisions of the vehicle's warranty.

Owner Action

If you own a 2024 Jeep Compass and are experiencing a Malfunction Indicator Lamp (MIL) illumination, particularly with DTC P0128-00, or notice symptoms like your engine running cold or a lack of cabin heat, it is recommended to contact your authorized Stellantis dealer. Inform them about the symptoms and mention Technical Service Bulletin 07-006-24 or Rapid Service Update 24-112. The dealer can verify if your vehicle is covered by the RSU and perform the necessary thermostat replacement. This repair is covered under warranty.

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Source: NHTSA ID: 11006257