Volvo AWD V70-XC70 Forum

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09 V70 Defrost Problem V70-XC70 1998

My 98 V70 fogs my windshield...when I turn on the defrost or heat. In cold weather, I can have a clear windshield, but if I need heat, the minute I turn on heat...the windshield fogs up. Then I switch to defrost and it actually gets worse. Sometimes I have to pull over and wipe the windshield to even continue down the road. There is no unusual level of humidity in the car that I would think would cause this issue. Any ideas from you gurus?








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    09 V70 Defrost Problem V70-XC70 1998

    Do you smell anti-freeze when you turn on the heat? If so, you likely have a heater core leak. If not, be sure your A/C is working properly.








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      09 V70 Defrost Problem V70-XC70 1998

      You got it. Faint smell of coolant. Thanks for your help.







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