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KB Home / Equipment / Gas Furnaces / ICP/Heil / N95ES / N95ES Fault Codes/Diagnostic Codes

N95ES Fault Codes/Diagnostic Codes

Article ID: 741
Last updated: 24 Dec, 2025

Heil N95ES Gas Furnaces

Re: Lockout Codes / Diagnostic Codes

Each of the following status codes is a Single or 2-digit number.

► The first digit is determined by the number of SHORT flashes and the second digit is determined by the number of LONG flashes.

► For Example: 1-Short Flash, 2-Long Flashes (- , — —) = Code 1+2.

Code Description Information
2 PRESSURE SWITCH FAILED TO OPEN Pressure switch stuck closed.
3 LPS FAILED TO CLOSE OR RE-OPENED If LPS opens for more than 5 minutes, inducer will shut off for 15 minutes before retry.
4 LIMIT CIRCUIT FAULT Indicates a limit or flame rollout is open.
5 FLAME SENSED WITH GAS VALVE OFF Inducer will continue to run until fault condition is cleared.
6 IGNITION PROVING FAULT Failure to sense flame.  4 consecutive faults will cause a 6 + 1.
7 LIMIT CIRCUIT LOCKOUT Limit circuit open for more than 3 minutes. Auto-Reset after 3 hours.
8 GAS HEATING CIRCUIT LOCKOUT Control must be manually reset.
9 HPS FAILED TO CLOSE OR RE-OPENED 3 consecutive failures will cause a 3-hour lockout.
10 POLARITY ERROR Line voltage (115VAC) reversed or Twinning Error.
1+2 BLOWER ON AFTER POWER-UP Blower runs for 90 seconds if "W" is energized at power-up.
6+1 IGNITION LOCKOUT 4 Ignition Faults (Code 6) - Auto-Reset after 3 hours.
ON CONTROL CIRCUIT LOCKOUT Auto-Reset after 1 Hour - Look for: Gas Valve Relay Stuck, Flame Sense Circuit Fail, or Software Check Erron
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Article ID: 741
Last updated: 24 Dec, 2025
Revision: 4
Access: Public
Views: 1187
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