OT----Air Conditioner Question-I'm HOT!

What would cause my home air conditioner to Ice Up the "A" coil? I have good air flow now, after melting it out, but it is not cooling.

It was working OK yesterday, but this morning, I had absolutely no air flow through the vents. I changed the filter and turned on the heat to melt the coil, but now I have no cooling.

What would be most likely the problem??

Low on Freon or dirty coils.

Three things will cause an "A" coil in a split system to frost up.
1. Low air flow cause by clogged fan, motor speed not up to spec., or loose fan belt if belt driven
2. Dirty "A" coil. Caused by running with a dirty or no filter. Need to clean with vacuum.
3. Low freon charge. A minor leak over a few years will do it. It may need only 1/2 lb to correct the problem. This should be done by a refrigeration mechanic.

low freon charge just went through that this year
small leak just need a freon top up sometimes the leaks are a PIA to find
bob

Had similar issues this last weekend with our A/C. Last time this happened, it turned out to be the motor was fried. This time, noticed the problem when the house was warming up but the compressor was running. Checked and found the fan wasn't. Jumped on it before the coil iced up. Found a couple of problems that caused the fan motor to run intermittently. The furnace has a button switch that cuts ac power when you remove the access panel. Jiggling it caused the power to flicker off/on. Appears to be bad contacts. Jumpered the switch temporarily. This improved the situation. But also found that opening the door on the programmable thermostat or pressing buttons would cause the fan to flicker off/on. Suspect to be poor contact on the "FAN" signal in the thermostat. Disassembly & repair (if possible) of the thermostat is next step. Otherwise, replacement.

Just wanted to point out that there can be a couple of other things that cause the fan to run intermittently, which reduces air flow and promotes icing. Also, put your hand on the A/C lines running into your furnace. Should be noticable difference (hot/cold) between the 2 lines.

Hello
There are many reasons for the yce to form in the a coil. As mentioned can be low on refrigerant, dirty filters and low air circulation.
If you closed any of the outlets, open them up.
proper air flow will be diminished with some closed vents. Most likely a leak in the system, adding gas won't fix the leak. It may last you the rest of the season. But like a slow air leak on a tire, it will leak out again.
Guido.

I moved a couple years ago and took my new 2-1/2 ton compressor and hooked up to the new furnace in the new house and it freezes up. I was told my a coil was only 2 ton and that's why it freezes up.