Step 1: Is the fan running?

• Yes → Continue to Step 2
• No → Go to: Fan / No Airflow Issue

Step 2: Is any heat coming out at all?

• Yes (slightly warm)
  → Unit may be underperforming
  → Continue to Step 3
• No (completely cold air)
  → Continue to Step 3

Step 3: Is a wall thermostat connected?

• Yes
  → The unit may not be receiving a proper heating signal
   Go to: Thermostat Troubleshooting Guide
• No → Continue to Step 4

Step 4: Check Dip Switch Configuration

Incorrect dip switch settings can disable or affect heating.

Ensure:

• Heating is enabled
• Correct control mode is selected

Go to: Dip Switch Guide

Step 5: Restart the Unit

• Turn the unit OFF
• Wait 1–2 minutes
• Turn it back ON in HEAT mode

Check if heating starts

Issue still not resolved?

Please contact support: SUBMIT A REQUEST HERE