American Standard
Evaporator Coil Icing
American Standard air conditioner freezes up with ice on the indoor coil or suction line
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Dirty air filter, Restricted return or supply airflow, Low refrigerant charge, Blower motor not running at full speed
How to Fix / Troubleshooting
Safety first: Turn off cooling at the thermostat and set the fan to ON to thaw the coil. Do not chip ice with tools.
- Replace air filter: Install a clean filter and ensure it is the correct size and not overly restrictive.
- Check vents: Open all supply and return vents and remove obstructions like furniture or rugs.
- Inspect blower operation: Verify that the indoor blower is running strongly in cooling mode. Weak airflow may indicate a failing motor or dirty blower wheel.
- Call a technician if icing recurs: Persistent icing after airflow issues are corrected usually indicates low refrigerant or metering device problems that require professional service.
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Repair Difficulty
Medium
3/5
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