Sounds like heater coil problem or first check fluid in your cars radiator if your fluid is too low in main engine system will not supply heat to heater coil, also check your cars temp gauge is it going to normal or staying in the cold area, if staying in the cold area then your engines thermos stat is stuck open
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Sounds like heater coil problem or first check fluid in your cars radiator if your fluid is too low in main engine system will not supply heat to heater coil, also check your cars temp gauge is it going to normal or staying in the cold area, if staying in the cold area then your engines thermos stat is stuck open