Rheem
Improper Cycle Rate / Differential Settings or Equipment Protection
Thermostat frequently cycles the HVAC system on and off in short intervals (short cycling).
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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
Cycle rate set too high, Temperature differential too small, Oversized HVAC equipment, Safety lockouts resetting frequently due to underlying faults
How to Fix / Troubleshooting
Steps:
- Check thermostat settings: In advanced settings, adjust cycle rate or minimum run-time to a lower frequency (longer cycles) if available.
- Increase differential: Slightly increase the temperature differential (swing) so the system runs longer but less often.
- Inspect filter and airflow: A clogged filter or blocked vents can cause overheating and safety trips, leading to short cycling. Replace filters and open vents.
- Monitor for error codes: If the thermostat or equipment shows lockout codes, address those underlying issues.
- If short cycling persists with proper settings: Have a technician evaluate equipment sizing and safety controls.
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Repair Difficulty
Medium
3/5
Required Part
Thermostat Configuration (No physical part)
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