The fan blows fine, and the ac works fine for about 4-6 hours, but during the night, pieces of ice come flying out of the vents. It doesnt shut off or anything, and if we leave it off for an hour or two it works fine for another few hours. Is this a freon problem? What do I need to have to check it myself?
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Re: A/C is blowing out chunks of ice!!!
If it is not shutting off, I would believe that it is do to either a bad thermostat or a stuck relay (probably on the roof unit). Both are relatively cheap and easy. If you have it done by a tech, have slap the gauges on while he is up there to check the refrigerant levels.
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unplugged the unit, kept the doors closed about 10 to 12 hours plugged back in and in about 2 hours started blowing cold air into freezer another 4 hours was blowing cold air into refrigerator and continuily got back to the themostat settings,about 1 day. no food was lost because the doors were closed still keeping it cold. i think the fan in the freezer was frozen with ice,but could access it, not the main fan in the back the unit by the compressor,that was running fine. so basically i defrosted the freezer fan by unplugging it. this is the 2nd time in 4 years ive done this, well it beats spending 1000-1500 dollars to replace it TRY IT I HOPE IT WORKS FOR YOU BEFORE YOU CALL FOR SERVICE,dave
Sounds like you have a zone system? Is it a bypass type? If it is the fan speed of the heater must be to slow to override the bypass damper. Wire the fan to operate at a single speed same speed as on the A/C.
It sounds as if your defrost timer has failed. Unplugging the unit over night allowed the unit to defrost. If unplugging it overnight or by using a stnd fan blowing into the freezer section for 90 minutes results in the fan blowing cold air then your unit is not defrosting. Most often the defrost timer is the problem. However there could be other defrost circuit like the thermostat or the defrost element. In order to provide you with the correct solution and defrost timer location you should privde your model number for further instructions.
It's most likely an airflow problem, you say you had the vents closed? Icing up is normally caused by lack of load (air flow) or loss of refrigerant charge. Make sure all your vents are open to allow for as much airflow as possible and that your filter is clean. Some units do not work well on low airflow setting when the outdoor temps cool down at night.
If you live in a climate where temperature drops in the evening and night time hours run the system with the fan in the on position. This will allow any ice buildup on the cooling coil to melt in the off cycle.
The cooling coil is more than likely iced over stopping the air circulation. Put the fan control in the on position and turn the cooling to off. After an hour or so the ice will clear from the coil and air circulation will be re-established. Then return to cooling and leave the fan control in the on position when in the cooling mode. This will provide air circulation to melt any ice from coil during the off cycle.
check freezer for frost build up and if fan blowing, check condenser make sure clean, and fan blowing,
check vents in refrig. make sure no blockage, freezer control should be in the middle setting,
you can try turning that to Warmer freezer allowing MORE air to refrigertor side.