Jeep Liberty no heat and stuck in second gear with passed compression test on Jeep Liberty

Some Jeep Liberty owners report experiencing issues such as a lack of heat and being stuck in second gear. The no heat problem may be attributed to a faulty thermostat that remains stuck open, blend door malfunctions, or coolant leaks near the upper mount of the driver's side tank. In some instances, unplugging the AC condenser has provided a temporary fix. Additionally, owners facing transmission issues may find their vehicle stuck in second gear, which could indicate underlying transmission problems or stuck valves in the 42RLE transmission. Specific error codes like P0731, P0137, P0132, and P0330 may also shed light on the severity of these gear-related issues. While a passing compression test suggests that the engine's internal components are functioning correctly, these concerns highlight the need for prompt attention to the heating and transmission systems.