How to Fix / Troubleshooting

Safety: If you see smoke or suspect fire, shut off power and gas immediately and call emergency services. Otherwise, proceed cautiously.

Initial burn-off: A mild odor is normal for a new SunHeater during the first few hours of operation as oils and paint cure. This should dissipate quickly.
Inspect for debris: With power and gas off, remove panels and check the Heat Exchanger and burner area for plastic bags, insulation, or wiring that may be touching hot surfaces.
Re-route wiring: Move any harnesses away from the heat exchanger and secure with high-temperature cable ties.
Check for discoloration: Look for browned or melted wire insulation. Replace any damaged wiring harnesses.
Monitor: After corrections, run the heater and monitor for lingering smell. Persistent strong odor warrants professional inspection.

Heater emits a strong burning or plastic smell when first starting or after repair

Possible Causes