What do u do when your air conditioner forms ice on it and u have central air unit?

Question

What do u do when your air conditioner forms ice on it and u have central air unit?

Answer 1

Forming ice on the evaporater can be a couple different reasons for it.

1. Check and change your air filter.

2. Your evaporater coil could be dirty.

3. Your system could be either over or under charged.

Try turing the unit off and letting it defrost, you can speed up the process by using a hair dryer. Change your air filter and see if that works. Look at the evaporater coil and see if it is dirty, if it is you can go to any AC whole house and buy a coil cleaner. you will want to mix it 50-50 with water. Spray it on the coil and it will foam and push out any dirt. Repeat the process until white foam only comes out. You dont have to do anything else this will all fall into your condensation pan and drain out. Good luck

Answer 2

Shut it down. You have a frozen motor. If you leave it on, you may burn it out.

Freezing happens when the temperature on the thermostat is set too low. The unit continues to cycle and has no "break" during which it drains. (the evaporator coil has to evaporate)So, it freezes.

Shut it down (12 to 24 hours) and then turn up the thermostat. If you continue to have problems, call your HVAC person. Be sure to tell them it froze.

HVAC CANNOT FIX IT UNTIL IT THAWS! They can come out, and charge you for visiting, and then say call us back (and pay again) when it's thawed. Most of them do not carry hairdryers or portable heaters on their trucks(especially in the summer), nor do you want to pay $75 to $125 to have them do that.

Your HVAC tech answer is a good one, but in my state, only HVAC can get coil cleaner... Most HVAC guys would tell you not to mess with it. Every unit is different. To me, I'd rather pay someone, get it right, than to maybe mess up and buy a new expensive part or even the entire unit. Just the motors can start at $300 + labor, I get a little ill thinking of the price of a new one.

Answer 3

3 things can cause this phenomena: Dirty coils.low freon,and atmospheric conditions. When its raining out you raise the thermostat and solve the atmospheric. You clean the coils removing as much dirt as possible to allow for the best distribution of cooling to solve the dirty equation, finally, you charge the unit on the low side till that low side pressure measures around 68.5 psi to give you 40 degrees across the A-coil if you are using R-22 freon. A poor mans way of seeing if an air conditioner is low on gas is to block the evaporator coils with a piece of cardboard. If this causes the coils to frost up all the way back to the compressor then that is an indication that the system does not need charging. It also illustrates what happens when a perfectly good air conditioner gets clogged up.

Answer 4

Turn up the thermostat until it defrosts, then don't turn it down as far.

You may be low on freon in the unit.  Call a repair company for this.

You may have reduced airflow around the unit.  If there is a barrier (around the outside unit) or the coils are dirty (outside and inside units), the result can be reduced airflow and freezing up.

Answer 5

Your Freon is low time to call repairman.

Answer 6

1st turn it off.  Let it defrost.  Check air filter and inside blower.  While in the off position at t-stat leave the inside blower on until you start getting good airflow from the registers.  Once the unit is defrosted, you can restart the unit.  Usually freezing up is caused by 1 of 3 things.  T-stat set too low (lower than 68) ,poor air flow across the evaporator coil, or the unit is undercharged.  Good luck and God Bless