A/C FREEZING-UP

SYMPTOMS:

• Visible Ice On the Coil or Lineset
• Visible Ice at Outdoor Unit
• No Airflow from Registers

WHAT THE CUSTOMER SHOULD DO: If the customer notices ice on the coil cabinet, on the lineset, or in the outdoor unit they should do the following:

1. Turn the System Off 

• Turn the thermostat System switch to the "Off" position.
• Continuing to operate the unit will cause the freezing to get worse and may cause serious equipment damage.

2. Turn the Fan On

• Turn the thermostat Fan switch to the "On" position.
• This will help to thaw the coil and also helps keep dripping water blown away from the motor.
• BE PREPARED FOR WATER!
  • When a badly frozen coil thaws it will generally drip water that either misses or over-runs the drain pan.
  • Have towels ready, especially when the coil is in a closet or above a ceiling.

3. Check the Air Filter

• A dirty air filter is the most common cause of coil freeze-up.
• Depending on the location of the filter, it may not be possible to remove the filter until after the ice melts.
• When the coil completely thaws, and with a clean air filter, put the thermostat system and fan switch back to normal.
• If the coil continues to freeze-up - Schedule a Service Appointment.