# Foggy windows **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** jetta, volkswagen\ **Created:** [December 10, 2012, 11:10pm UTC](https://community.cartalk.com/t/foggy-windows/76057 "2012-12-10T23:10:39Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![kkkay](https://avatars.discourse-cdn.com/v4/letter/k/278dde/32.png) [@kkkay](https://community.cartalk.com/u/kkkay)\ **Post date:** [December 10, 2012, 11:10pm UTC](https://community.cartalk.com/t/foggy-windows/76057/1 "2012-12-10T23:10:39Z")
Our 2006 Volkswagen Jetta TDI, with 227,000 miles, recently started to fog up inside everytime we drive it. The dealership cleaned the sunroof drains thinking that was likely the cause (although, the car is always garage parked). That did not resolve the issue. We have to have the defrost on full blast to be able to see out the windows, and still we need to roll back windows down to wipe condensation to see out of them when making a turn. Please help give us ideas what could be going on? ---
**Author:** ![rustfetish](https://avatars.discourse-cdn.com/v4/letter/r/5e9695/32.png) [@rustfetish](https://community.cartalk.com/u/rustfetish)\ **Post date:** [December 10, 2012, 11:18pm UTC](https://community.cartalk.com/t/foggy-windows/76057/2 "2012-12-10T23:18:12Z")
Keep an eye on your coolant levels, I have had and have seen windows fog constantly due to a heater core leaking. It doesn’t take much of a leak to fog up the windows. ---
**Author:** ![lion9car](https://avatars.discourse-cdn.com/v4/letter/l/59ef9b/32.png) [@lion9car](https://community.cartalk.com/u/lion9car)\ **Post date:** [December 10, 2012, 11:19pm UTC](https://community.cartalk.com/t/foggy-windows/76057/3 "2012-12-10T23:19:41Z")
Has the air-conditioning system been verified to be working correctly? ---
**Author:** ![Big\_Marc](https://avatars.discourse-cdn.com/v4/letter/b/9d8465/32.png) [@Big\_Marc](https://community.cartalk.com/u/Big_Marc)\ **Post date:** [December 10, 2012, 11:41pm UTC](https://community.cartalk.com/t/foggy-windows/76057/4 "2012-12-10T23:41:00Z")
i think your car’s heater core is leaking. ---
**Author:** ![nsane](https://avatars.discourse-cdn.com/v4/letter/n/b9e5f3/32.png) [@nsane](https://community.cartalk.com/u/nsane)\ **Post date:** [December 11, 2012, 1:51am UTC](https://community.cartalk.com/t/foggy-windows/76057/5 "2012-12-11T01:51:09Z")
I would also check to make sure the drain hole for the evaporator case is open and not clogged. This would prevent any condensate from draining with the air conditioner system being on. Try to make sure the air conditioner is also on when you use defrost to pull any moisture out of the car as well. Your statement said “we” but you didn’t say how many “we” pertains to. Having 4 people in the car can also add lots of moisture to the interior. ---
**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\ **Post date:** [December 11, 2012, 2:40am UTC](https://community.cartalk.com/t/foggy-windows/76057/6 "2012-12-11T02:40:43Z")
Check all your carpets (including the trunk) and see if any are damp, there could be a water leak. But my first guess is a leaking heater core (especially if there’s a residue on the windows) or your a/c isn’t turning on when you use defrost. ---
**Author:** ![keith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/keith/32/5518_2.png) [@keith](https://community.cartalk.com/u/keith)\ **Post date:** [December 11, 2012, 6:10am UTC](https://community.cartalk.com/t/foggy-windows/76057/7 "2012-12-11T06:10:38Z")
are you leaving it on recirculation? You should be on outside air. ---
**Author:** ![kkkay](https://avatars.discourse-cdn.com/v4/letter/k/278dde/32.png) [@kkkay](https://community.cartalk.com/u/kkkay)\ **Post date:** [December 12, 2012, 2:59am UTC](https://community.cartalk.com/t/foggy-windows/76057/8 "2012-12-12T02:59:03Z")
Wow, thank you to everyone who has given us directions to pursue. FYI ususally there are one or two people in the car. My husband is now tackling looking at these leads… ---
**Author:** ![longprime](https://avatars.discourse-cdn.com/v4/letter/l/e79b87/32.png) [@longprime](https://community.cartalk.com/u/longprime)\ **Post date:** [December 13, 2012, 12:18pm UTC](https://community.cartalk.com/t/foggy-windows/76057/9 "2012-12-13T12:18:34Z")
The bros always lick the windshield - If sweet then you got a bad heater core. and if not sweet, odds that you got water leak in the rear door panel. Tom and Ray were correct 4x on our Jettas. We had both problems on 2 VW;s ☹