Rheem Error Code A101: Condensate Blockage

Severity: Warning
Type: digital display
Where to look: front panel

Warning: Your Rheem HVAC system has detected a potential issue with the condensate drain line. This could lead to water damage if not addressed promptly.

How to Fix Rheem Code A101

Check the condensate drain line for any visible blockages or kinks. If you find any, try to clear them using a wet/dry vacuum or a plumber's snake.
Ensure the drain line is pitched correctly to allow water to flow out of your home. It should have a slight downward slope towards the exit point.
If you're unable to clear the blockage or the problem persists, contact a professional HVAC technician for assistance.

How to Reset Rheem Code A101

Turn off the unit using the power button on the front panel.
Turn off the gas supply valve.
Turn off the circuit breaker supplying power to the unit. Wait 30 seconds.
Restore power at the breaker, then open the gas valve.
Turn the unit back on. If the error returns, the underlying issue needs repair.

What does A101 mean?

The Rheem A101 error code indicates that your HVAC system has detected a blockage in the condensate drain line. This line is responsible for removing the moisture created during the cooling process. If left unchecked, this blockage can cause water to back up and potentially overflow, leading to water damage in your home. It's important to address this issue as soon as possible to prevent any potential damage.

Affected Models

Replacement Parts

Part	OEM Number	Est. Cost
Condensate Drain Line	RHEEM 31-0017	—

Related Codes on Same Models

Code	Description	Severity
A001	Ignition Failure	Warning
A003	Abnormal Ignition	Warning
A004	False Flame Detection	Warning
A008	Exhaust Temperature High	Warning
A011	No Flame Detected	Warning
A021	Over-Temperature	Warning
A031	Inlet Thermistor Open/Short	Warning
A041	Outlet Thermistor Open/Short	Warning
A043	Water Level Error	Warning
A051	Fan Motor Abnormality	Warning