Lennox SLP98UHV Error Code E 202: Indoor Blower Motor Mis-Match
What Does Code E 202 Mean?
Error code E202 on the Lennox SLP98UHV indicates that the indoor blower motor horsepower does not match the unit capacity that has been programmed into the control board. This is a configuration error rather than a mechanical failure.
During installation or after a control board replacement, the technician must program the correct furnace size code into the system. If the wrong size code is selected, the control board expects a different motor than what is actually installed. This mismatch can cause the blower to run at incorrect speeds, leading to improper airflow, comfort issues, or efficiency problems.
A technician needs to verify the correct unit size codes using the configuration guide included with the furnace or referenced in the installation instructions, and reprogram the control board accordingly. The furnace may still operate with this code present, but performance will not be optimal.
Common Causes
| Cause | Likelihood | DIY? |
|---|---|---|
| Incorrect furnace size code programmed during installation | Most common | ✗ Call a pro → |
When to Call a Professional
Contact a licensed HVAC technician if:
- This code appears after a new furnace installation or control board replacement
- You notice the blower seems to run too fast or too slow for the heating or cooling output
- The furnace was recently serviced and the code appeared afterward
✓ Verified against manufacturer service manual — March 2026