My ac line has a bit of frost on it and isn't blowing as hard. This has happened 3 times now. So I turn cool off and just run the fan for an hour and it works fine for a few days. I've changed the air filter last week. My coil I know has a leak I had it checked when I had refrigerate put in around may. My question is what could it be ?

  • 1
    Did you have a question?
    – HandyHowie
    Aug 4, 2022 at 8:00
  • Thank you! I know I have a leak but, this doesn't seem like low refrigerant what could it be. I had freon filled in May Aug 4, 2022 at 11:56
  • 5
    Low freon. Just because you had it filled in May doesn't mean it's not low now.
    – jwh20
    Aug 4, 2022 at 12:31
  • 2
    Yep, low freon can cause the evaporator coil to be excessively cold, causing it to ice up on the outside.
    – Hot Licks
    Aug 4, 2022 at 12:49
  • Freon won't cause the fan to change speed. Well, ice might. I'd also check for a power problem. Aug 4, 2022 at 18:05

1 Answer 1


If the outside of the evaporator has a build up of ice on it, the fan wont be able to blow air through the evaporator so you will get a drop in flow.

Turning the AC off will allow the ice to melt and hence it will work correctly again when you turn it back on.

Is the evaporator able to drain condensation ok?

  • Would it work for days at a time? Cause the last time was like a week ago or more and it happened about a week before that. I'll check the evaporator drain. Aug 4, 2022 at 18:18
  • You need to get the charge replenished, that is what is causing your problems as I can determine from what you said. The real solution is to get the leak fixed or expect this to happen on a regular basis. As time passes it will get worse then no AC.
    – Gil
    Aug 4, 2022 at 19:32

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