This Ford Fiesta had wet 'floorboard' on the driver's side and passenger side, indicating that the car had a leak.
We knew there was water leaking from the front because of the wet carpets in the footwell, but was also a leak in the boot.
First, we decontaminated the inside of the car using an antimicrobial, then using a can of water to simulate the effect of raining, we realized that the water was leaking through the door membranes.
Also, there were leaks in the back and the passenger footwell, which was soaking into the carpets. The water that was getting into the boot was leaking in through the rear air vents, which were found after our 28 point check leak diagnosis.
Solution: The door membranes were replaced, and the rear vents were fixed and re-sealed. Then the car was dried.
Question: "I don't have a sunroof and never had a new windscreen, but there is water dripping from the centre roof light when it rains."
Answer: This sounds like the windscreen has become unbonded and is leaking from the top, causing water to run down to the roof. This is a common cause of leaks if you have had a replacement windscreen, or sometimes factory screens can become unbonded over time, letting water in. Getting the screen refitted should stop this leak.
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