Peerless
Insufficient Heat Output
Boiler cycles on and off but house does not reach thermostat setpoint
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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
Incorrect boiler setpoint, air in system, undersized circulator, mixing valve set too low
How to Fix / Troubleshooting
Safety first: Use caution around hot components.
Steps:
- Check boiler temperature: Verify the Peerless control setpoint is adequate for the heating system type (e.g., baseboard vs. radiant).
- Bleed air: Remove air from radiators and loops to restore full heat transfer.
- Verify pump sizing: Ensure the circulator is appropriate for the system length and head loss.
- Adjust mixing valve: If a mixing valve is installed, increase its setting within safe limits.
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Repair Difficulty
Medium
3/5
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