Clear Water Leak Under Ford Explorer (AC Off)
Clear water leaking from under the vehicle when the AC is not running is unusual. Since the fluid is clear and not oily or colored, it is likely condensation from the air conditioning system (even if the AC was not on, the defroster or humidity could cause it) or possibly rainwater from the cowl or sunroof drains. In rare cases, it could be coolant from a leak in the heater core or radiator, but coolant is usually colored (green, orange, or pink) and has a sweet smell. Given the 2020 Ford Explorer, a common issue is clogged AC evaporator drains or water intrusion from the HVAC system.
Diagnosis Details
Possible Causes
Condensation from the HVAC system (even with AC off, defrost mode or high humidity can produce water)
Clogged or disconnected AC evaporator drain tube causing water to pool and leak elsewhere
Rainwater or car wash water trapped in cowl or sunroof drains, leaking out under the vehicle
Coolant leak from heater core or radiator (if fluid is actually clear and not colored, but this is less common)
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What You Should Do
Check the fluid color and smell: if it's clear and odorless, it's likely water.
Inspect the passenger side floor for dampness (clogged AC drain).
Run the AC for a few minutes and see if water drips normally under the car.
If the leak persists when the HVAC is off and no rain, have a mechanic check the coolant system for a slow leak.
For a 2020 Explorer, also inspect the sunroof drains if equipped.
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Disclaimer: This AI-generated diagnosis is for informational reference only. Always consult a qualified mechanic for an in-person inspection. AutOwner is not responsible for decisions made based on this information.
