I have to turn on the air conditioner to defrost my front window during the winter time. If I turn on the heater to defrost it gets worse. How do I fix this?

If your car has an air conditioner turn it on as well as the heater . Air conditioned air is very dry and usually defrosts the windscreen quickly. The heat from the heater will overcome the cold air from the air/con. It is good for the air/con to be run during the winter months as well as summer, it stops the seals drying out and leaking refrigerent.

Hey Tbs,
You are correct in assuming it will get worse.. if you are leaking antifreeze, it wil not fix itself (DO NOT put any kind of "radiator stop leak" in it) .... take it to a qualified professional and tell them whast happening and let them repair it!! (a radiator shop - NOT the dealer)..

hi,

you may get some noise from the pullies to some degree, when you switch your heater and/or defroster on the heater fan draws major amps and the defroster secretly turns the air conditioner on to defog the windows, so thats two major things drawing off the pullies. have you had your serpentine belt serviced ever? it may be time for a new serpentine belt? It could also mean your serpentine idler pully bearings may be getting ready to go, the alternator may be getting ready to buy acreage also. watch your gauges closely when your driving. your car is getting ready to have one of these accessories go out, dont take it on long trips and take it to your mechanic if it gets any worse. clean your battery posts in the meantime also..

jm

jm

On most vehicles the AC comes on when the defrost is on to keep AC compressor/clutch from seizing up from non use during winter months.

the rear switch is bad worse case the motors are bad but not likely try replacing the swich or the child safty swich is in the off pos...? turn the safty off use the back seat switch if this doesnt work replace the front switch

there is nothing that is going to break by having the AC on and then turning up the temperature all the way except a little worse fuel mileage. Keep in mind that your AC comes on during the defrost mode to help dry the air inside your car so your windows dont fog up. If there is no air movement then it sounds like the blower fan decided it was time to quit. It just happened now instead of the middle of winter or the day you needed the defroster--(defogger)

you my friend have a vacuum leak, do your self a favor and replace ALL the vacuum lines i am sure your problems will go away.

U HAVE A LEAKING HEATER CORE.

It could be you pollen filter that needs replacing, but check first that you haven't got your heater control on recurculation.

This is normal....everything is working fine...if the window is being defrosted.

The defrost on a car works by using the A/C to remove the moisture from the air (thereby lowering the relative humidity)
It also lubricates the seal within the A/C unit during the winter...reducing the chance of seizure/failure during the following summer due to lack of lubrication.