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Water In The Footwell

Wet carpets in the front footwell usually come from a blocked air conditioning drain, blocked scuttle drains under the windscreen or a leaking door or windscreen seal.

Normal risk

Not urgent, but fix it soon. Water causes mould and can damage wiring and control units under the carpet.

Short answer · Why is there water in my car footwell?

First check whether it is water or coolant: coolant feels slippery and smells sweet. Clear water usually comes from a blocked AC drain or the drains under the windscreen scuttle panel, which fill with leaves. Door membranes and windscreen seals are the next suspects.

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Safe checks you can do

  1. Smell and feel the waterSweet and slippery means coolant, not rain.
  2. Clear the scuttle drainsRemove leaves from the area under the windscreen wipers.
  3. Check after AC use or rainWet after AC use: AC drain. Wet after rain: seals or drains.

Questions that narrow it down

  1. Is it the passenger side?The AC drain is often near the passenger footwell.
  2. Wet only after rain?Scuttle drains, seals or sunroof drains.
  3. Is the windscreen misting a lot?Moisture or coolant in the cabin.

Possible causes

Listed without ranking. Use the questions above to see which ones fit your car.

  1. Blocked AC drainCondensation runs inside.
  2. Blocked scuttle drainsRain overflows into the cabin.
  3. Door membranePlastic sheet behind the door trim.
  4. Sunroof drainsBlocked tubes overflow.
  5. Heater core leakCoolant, not water.

Questions about Water In The Footwell

Can water damage electronics?

Yes, many cars have control units and wiring under the carpets.

How do I dry the carpet?

Fix the leak first, then lift the carpet if possible and dry it thoroughly to prevent mould.