Question about 1994 Honda Accord

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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?

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To understand how a/c works will explain what is happening. A/c works by moving the haet from inside to outside. at the evaporator which is inside the car this action freezes the coils and the hot air of the inside condenses on the coils and water is drained outside. When there is no more water left in the air in side the car the windscreen goes clear. When you use the heater the water in the air in the car will still form as fog on the inside until the air temp dries it out. In short it is more efficient to use the a/c for short spells to clear the screen than the heater demister

Posted on Jan 10, 2013

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Posted on Jan 02, 2017

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SOURCE: When the defrost is on in rainy weather, it blows

Yes, that's the way it works.

Posted on Oct 19, 2009

  • 398 Answers

SOURCE: air conditioner staying on...

Many cars use air conditioning as part of the defrost function. Cold air will clear windshield faster than hot air.

Posted on Aug 01, 2008

  • 22156 Answers

SOURCE: Front Defrost

clean the pollen filter wherever it is some are under the dash in the ac unit and some are below the grill vents where the wipers are.if this doesnt work then it could be a trampilla playing up thats controling the air in and recirculate .but if tis this then just disconnect the vacumn pipe and stick something in like a stic to hold the flap open .works on a vauxhaul zaffiro and a citreon zx

Posted on Nov 18, 2008

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Everytime I turn on the front defrost, the air condition goes on, how can I turn it off. Please note, the air condition button/light is already off on the front dash board.

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.

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