Raypak Overheating Cabinet / Poor Ventilation

Heater cabinet or nearby surfaces become excessively hot to the touch during operation.

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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

Blocked air openings on cabinet, Heater installed too close to walls or other equipment, Internal fan not operating (if equipped), Excessive flue gas recirculation

How to Fix / Troubleshooting

Safety first: Turn off power and gas. Allow heater to cool before touching cabinet surfaces.

Steps to address overheating cabinet:

  • Check clearances: Measure distances to walls and objects. Adjust installation to meet Raypak’s minimum clearance requirements.
  • Clean louvers: Remove debris, leaves, or dirt from cabinet louvers and grilles to restore airflow.
  • Check internal fan (if present): Confirm any cabinet cooling fan runs when the heater is operating. Replace if failed.
  • Inspect vent termination: Ensure exhaust gases are not being blown back onto the heater by wind or nearby structures. Adjust vent termination if necessary.

Note: Excessive cabinet temperatures can shorten component life and should be corrected.

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Repair Difficulty

Medium 3/5
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