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How do you repair a leak from the heater coil?


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Wiki User
2015-07-15 21:25:11
2015-07-15 21:25:11

Here is advice:

  • Sorry friend but a repair on a heater coil is just about as much work as replacing it. Your best bet is to get a second hand one and just change it. If you attempt to fix the old one it will probably leak from another place. One thing that you can do is buy a bottle of stop leak if the leak is not too big.
  • Forget a second hand one by getting a second hand one you could be in the same boat as you were before you started the job. Go out buy a new one and be done with it. They are usually not to expensive and some places guarntee them for a lifetime. I just paid 23 dollars for mine lifetime warranty. Oh yeah that warranty does not include labor if it goes out again.
  • Forget the second hand one. replace it with a new one. it is not a big or difficult job

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If the drain plug under the evaporator coil is plugged up it will cause condensation to leak into the car. If the heater core is bad it will allow coolant to leak into the car. If the leak is warm and smells sweet it is the heater coil.

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See "Related Questions" below for more about 1986-1995 heater coresUsually If the heater CORE is bad it will start to leak, dripping water on the carpet, or steeming up the windows. i have a 1992 Taurus in the garage now for a new heater coil. white smoke, the sweet smell, is the heater coil. you may not see any water dripping in the car if it is a small leak. try a bottle of bars leak before repairing. it could get you through this winter. work for me last winter. sorry to tell you that to change the coil, the dash has to come out. only ford does it this way. the repair can be more than your car may be worth.

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If the leak is around a fitting and you can see it, then it may be repairable. Unfortunately many heaters leak at the welded seams and there is no satisfactory repair for that. You may well need a new heater.

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you can try radiator leak stopper, but i would just replace heater core .,eally cannot be repaired.

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