EcoSmart
Plumbing Cross-Connection / Mixing Issues
EcoSmart water heater output temperature is inconsistent between different fixtures in the home.
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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
Single-handle mixing valves bleeding cold into hot line, Recirculation system plumbed incorrectly, Shared tempering valve affecting some fixtures
How to Fix / Troubleshooting
Safety: Most checks are plumbing-related; turn OFF power only if opening the heater.
- Fixture comparison: Test hot water at multiple fixtures. If some are stable and others are not, suspect local mixing valves.
- Check mixing valves: Inspect thermostatic or pressure-balancing valves at problematic fixtures. Service or replace if they are cross-connecting hot and cold.
- Recirculation systems: If a recirculation loop is present, verify it is installed per EcoSmart guidelines with proper check valves and bypass arrangements.
- Bypass tempering valves: Temporarily bypass any whole-house mixing valve (if safe and allowed) to see if stability improves, then repair or replace the valve as needed.
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Repair Difficulty
Medium
3/5
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