start searching above the window we had similar and it was a roof joint leaking took the back out of the locker above and it was wet up there work your way down till you find it
Had the same when blowing a gale Scotland
Put gaffer tape between top of frame and body stopped
Found sscrew stripped at leak point on frame.
Plugged frame hole with shaving of rawlplug
Will test with hose when home may take frame out and bed on butyl
Open your window and look at the top where the window should seat on the seal to the body. If there is a small gap...you need a small amount of sealant or sika flex in Black.
Basically its a Poly vision window cassette you have fitted. The window itself slides into a Figure of 8 hinge . When fitted the hinge is sealed at the factory to prevent water being forced into the sides by heavy rainfall etc. Its possible the sealant is missing right above the water droplet you have on the picture. Ours was the same. Could not for the life of me work it out until Carolyn held the hose on the window for five minutes whilst I watched. It dribbled down the centre from the top where the sealant was missing.
Applied some sealant and all was sorted.
Open your window and give the inner frame a good clean. Make sure that the drain holes are clear.
I once had this happen whilst sat in the Motorhome, whilst raining. I noticed water on the inner sill.
It turned out that the window frame was dirty and the drain channel hole was blocked. Because the inner frame was dirty, the rubber seal wasn’t sealing fully, hence some water trickled in.
After a good clean and unblock, problem solved.
Good luck
100%. Window seal.
They spend so much time shut (seal flattened). The sun shines on them ( seal gets
stiff and less flexible ). The rain and some wind pressure and bingo, ingress.
We had both windows renewed.
Get some one to point a pressure hose at the window from outside and you will see.
I now leave the windows on night light whenever possible whilst the van is parked up.
Let us know what happens re the hose test.
Mitch.
We had similar water ingress (2010 Autotrail Savannah) on both N/S front sliding window (behind door) and O/S rear bedroom window. This had been going on for some time,, only a drip ....... drip ....... drip.....when raining hard so resealed ALL outside joints,, still happened. It turned out to be the front big Heki and rear mini heki rooflights. I had been up there cleaning the roof on my hand and knees, and must have broken the seal slightly. Put a new bead round the front and replaced the rear (due to removing and dropping during old sealant removal,, managed to break the unbreakable polycarbonate dome). Sorted it out totally.
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