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American Standard E6.3: Igniter fault

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

Status codeE6.3American Standard
What does American Standard E6.3 mean?

Igniter fault: the igniter relay fails, or the igniter is open.

Homeowner part this code names: furnace hot surface igniter.

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Call a pro: jump to when to call a pro Equipment type: furnace
How it shows: 7-segment display on an American Standard S9V2 two-stage variable-speed furnace: E6.3

American Standard S9V2 E6.3 is an igniter fault. The guide lists two conditions: the igniter relay fails, or the igniter is open. The heating sequence turns the ignitor on for about 20 seconds after 1st stage pressure switch 1 closes. E2.1 is the lockout after flame is never sensed, which can follow an igniter that never got hot. The igniter check itself is technician work.

Likely causes

  • Igniter relay failure
  • Igniter open

Safe checks for E6.3

  1. The heating sequence energizes the ignitor for about 20 seconds of warm-up after 1st stage pressure switch 1 closes
  2. Techniciancheck the igniter and the igniter relay on the control
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

Call a licensed HVAC technician. An open igniter will not glow, and the gas valve should not be forced on.

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Parts & tools for this fix

Taken from this code's causes or steps. A search link opens Amazon results and does not confirm a fit. Check the model number in the manual.

Furnace hot surface igniter: guide

In this code: Igniter relay failure

Search: American Standard furnace hot surface igniterSearch: Furnace hot surface igniter, general searchSearch: Universal hot surface igniter kit

Nut driver set: guide

In this code: Panels and parts on a furnace are held by hex-head screws; a nut driver grips them without stripping.

See the guide for what to look for when buying one.

Furnace pressure switch: guide

In this code: The heating sequence energizes the ignitor for about 20 seconds of warm-up after 1st stage pressure switch 1 closes

This one is for a technician to test or replace, so we only explain it and do not link to buy it.

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Related American Standard codes

E2.2Recycles exceededE3.1Shorted pressure switch, 1st stageE2.31st stage gas valve was notE3.4Open pressure switch, 2nd stageE3.2Open pressure switch, 1st stageE7.1The 1st stage gas valve (MVL)

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