A common cause is a build up of leaves and other detritus blocking the heater air intake drains so the rainwater level rises in the airbox until it flows through the heater into the car.
Certainly the first thing to check - often means removing the wiper arms and the grille at the base of the windscreen for access...
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A common cause is a build up of leaves and other detritus blocking the heater air intake drains so the rainwater level rises in the airbox until it flows through the heater into the car.
Certainly the first thing to check - often means removing the wiper arms and the grille at the base of the windscreen for access...