Water & airflow · COMPONENT REFERENCE

Condensate drain and float switch troubleshooting

Removes cooling condensate and stops the documented circuit when overflow protection operates.

Failure causes

Choose a cause for symptoms, checks that separate it from similar faults, repair direction and verification.

Blocked drain, trap or outlet →Condensate cannot leave at the required rate, raising water to the overflow switch.Stuck, damaged or misinstalled float →The sensing mechanism or installation does not represent the intended water level.

References and applicability

Original HVACSim explanations with manufacturer and instrument-maker references for further reading. These resources support the subject; their model-specific examples are not specifications for every system.

RectorSeal: Safe-T-Switch manufacturer resourcesOverflow-switch purpose and model-specific installation resources.

Editorial review: 2026-09-29. Verify the current manual for the installed model.