The A/C compressor automatically engages when the defroster is turned on to pull moisture out of the air. If the A/C system is low on refrigerant or the compressor is not engaging, the system will blow humid air against the windshield.
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Jeep Compass Problems
Browse Jeep Compass model years with exact WrenchConnect diagnosis signals while public source evidence is gathered.
Jeep Compass overview
Browse the Jeep Compass year index. Route-specific evidence is still being gathered before problem summaries are published here.
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WrenchConnect diagnosis signals
Even if water isn't pooling on the floorboards yet, a partially clogged drain tube can cause condensation to build up inside the heater box, adding heavy humidity to the air blowing out of the vents.
A severely dirty or damp cabin air filter can restrict airflow and introduce trapped moisture into the cabin when the blower is running.
If the HVAC system is stuck in 'recirculation' mode, it will continuously reuse the moist air inside the cabin instead of pulling in fresh, dry air from outside, leading to severe fogging.
Recent WrenchConnect diagnoses
My windshield keeps fogging up but the air is not helping
- Possible causes: Air Conditioning System Malfunction, Stuck Recirculation Door or Actuator, Clogged Cabin Air Filter, Blocked HVAC Evaporator Drain
- Recommended specialties: Heating & Cooling, Diagnostics, General Maintenance
Verification
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