Lennox E200: Hard lockout

Source: Lennox manual (PDF) (opens in a new tab) ↗ · Updated

Status codeE200Lennox
What does Lennox E200 mean?

Hard lockout: the rollout circuit is open, or it was open.

Call a pro: jump to when to call a pro Equipment type: furnace
How it shows: Seven-segment diagnostic LED on a Lennox SL280DFNV. This is not the red and green LED pair on an ML180.

Lennox E200 is the SL280DFNV seven-segment code for a rollout hard lockout. The installation instructions say the rollout circuit is open or was open, and the action is to correct that cause or replace the flame rollout switch, then test the furnace. It clears after the fault is recovered. It is not the ML180 red-slow / green-on limit pattern, and it is not E250, which is the limit circuit on this same control.

Likely causes

  • Rollout switch open
  • Rollout switch was open and the cause has not been corrected

Safe checks for E200

  1. Leave the furnace off. Do not reset a rollout switch and try another cycle
  2. Techniciancorrect the cause of the rollout trip, or replace the flame rollout switch, then test furnace operation. The code clears after the fault is recovered
Safety firstIf you smell gas, do not touch any electrical switch or use a phone in the building; leave immediately and call your gas supplier from outside. Turn off electrical power at the furnace switch or breaker before opening any panel, and never bypass or jumper a limit, rollout or pressure switch. Gas valve, burner, venting, wiring and control-board work should be done by a licensed HVAC technician.

Capacitors can hold a charge after the power is off. Safety terms.

When to call a pro

E200 is a rollout hard lockout. It is not the ML180 pattern of red slow flash with green on, and it is not E250 (limit circuit open). Call a licensed HVAC technician.

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High limit and rollout switches: guide

In this code: Rollout switch open

A safety device: we explain it but do not link to buy one.

Related Lennox codes

Alternating fast flashImproper main ground, OR line voltageAlternating slow flashWatchguard 1 hourBoard failure patternCircuit board failure or control wiredE223Low pressure switch failed openE250Limit switch circuit openE270Soft lockout

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