HEX: 17 - Gradient exceedance overheat protection

Fault Details:

• The temperature rise at the heat exchanger has exceeded the upper limit.

Recommended Solution:

1. Inspect the air intake and blow-out side of the heater for debris, damaged ducting, clogs, blockages, or obstructions.

2. Check the exhaust system for any issues.

Note: Fault code meanings can vary depending on the model and controller. If you’re unsure, contact Heatso directly.