Since the coolant reservoir was recently replaced, the cooling system may not have been properly bled. Trapped air pockets can prevent proper coolant circulation, especially at idle.
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Jeep Gladiator Problems
Browse Jeep Gladiator model years with exact WrenchConnect diagnosis signals while public source evidence is gathered.
Jeep Gladiator overview
Browse the Jeep Gladiator year index. Route-specific evidence is still being gathered before problem summaries are published here.
Model years
WrenchConnect diagnosis signals
At 153,000 miles, the water pump impeller may be worn out. This causes poor coolant flow at low engine RPMs (idling), but flow improves when driving at higher speeds.
Internal buildup in the radiator can restrict coolant flow. At idle, the flow is too slow to dissipate the extra heat from the AC, but higher engine speeds push enough coolant through to cool it down.
Even though the fan is running on high, dirt, leaves, or mud trapped between the AC condenser and the radiator can block airflow, causing the vehicle to overheat when there is no ram-air from driving.
Recent WrenchConnect diagnoses
When I idle with the air conditioning running it starts to overheat
- Possible causes: Air in the Cooling System, Failing Water Pump, Restricted Airflow through Radiator/Condenser, Partially Clogged Radiator
- Recommended specialties: Diagnostics, Engine, General Maintenance
Verification
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- credible_evidence
- wrenchconnect_diagnoses