E50
Rheem
Condensate Drain / Blocked Drain (for condensing models)
Heater displays E50 and shuts down shortly after starting
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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
Clogged condensate trap, Kinked condensate drain hose, Frozen or improperly sloped drain line, Faulty condensate float switch
How to Fix / Troubleshooting
Safety First: Turn off power before working on the condensate system. Condensate is mildly acidic; wear gloves and eye protection.
- Inspect drain tubing: Follow the condensate line from the heater to its termination. Straighten kinks and ensure there is continuous downward slope.
- Clean condensate trap: Remove the trap (if accessible), flush with clean water, and remove any debris or slime buildup.
- Check float switch: Some Rheem models use a condensate float switch. Inspect for free movement and test continuity when the float is raised/lowered. Replace if faulty.
- Protect from freezing: In cold climates, insulate or heat-trace the condensate line to prevent ice blockages.
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Repair Difficulty
Medium
3/5
Required Part
Condensate Trap / Float Switch
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