Green Mountain Grills
Temperature Overshoot / Runaway Heat
Grill overshoots the set temperature by 50°F or more and runs hotter than expected.
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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
RTD probe coated in grease, RTD probe placement affected by heat shield, Control board PID tuning issue, Auger relay sticking on
How to Fix / Troubleshooting
Safety first: Turn the grill off and let it cool before touching the RTD or internal components.
- Clean RTD probe: Gently wipe the RTD with a non-abrasive pad to remove grease and soot. Do not bend the probe.
- Check heat shield position: Ensure the heat shield is installed in the correct orientation and not blocking airflow around the RTD.
- Compare with external thermometer: Place a reliable grill thermometer at grate level to compare readings. If the GMG display is inaccurate, replace the RTD.
- Observe auger behavior: Watch whether the auger runs continuously even when at or above setpoint. If so, the control board or auger relay may be faulty and require replacement.
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Repair Difficulty
Medium
3/5
Required Part
RTD Temperature Probe
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