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Allied Error Code LED on: Normal operation (Furnace)

Updated · by Aurora Star Tech Inc.

Allied error code LED on on a furnace means: Normal operation. It is also called Allied diagnostic code LED on.

Low severityFurnaceA95/A93/95G1/92G1UH · A95/95G1UH · A93/92G1UH

Homeowner? What Allied code LED on means for you

Usually minor Your furnace is reporting: Normal operation. This code is usually informational or minor. The safe checks below often clear it; call us if it keeps showing up.

Safe things you can check yourself

  • Check the thermostat: right mode (Heat or Cool), set a few degrees past room temperature, and fresh batteries if it uses them.
  • Make sure the unit has power: its on/off switch (often looks like a light switch near the unit) is ON and the breaker in the electrical panel is not tripped.
  • Make sure the furnace front door or panel is closed properly; many furnaces will not run with the door switch open.
  • Look at the air filter. If it is grey and clogged, replace it; a blocked filter causes many shutdowns.
  • Outside, make sure the intake and exhaust pipes or vent cap are not blocked by snow, ice, leaves or a nest.
  • Check that the gas valve next to the furnace is open (handle in line with the pipe). Do not force it.
  • Try one reset: turn the power off for 30 seconds, then back on. If the code comes back, stop resetting and call a technician.

Call (647) 657-2977Book a service call

Licensed technicians serving Vaughan, Toronto and the GTA.

What does Allied error code LED on mean?

Steady LED on the control means the board is powered and running normally.

Applies to: A95UH, A93UH, 95G1UH, 92G1UH (sizes 045-08 to 135-20)

Safety: Gas, electrical and refrigerant work must be done by a licensed technician. Turn off power and gas before servicing, never bypass a safety control, and always follow the manufacturer's manual for your exact model.

Allied models that use code LED on

92G1UH92G1UH0450892G1UH0451292G1UH0700892G1UH0701292G1UH0901292G1UH0901692G1UH1101692G1UH1102092G1UH1352095G1UHA93UHA93UH1DA95UHA95UH1D

Other Allied Furnace codes

CodeMeaning
5 flashesRollout switch open
6 flashesPressure switch cycle lockout
7 flashesLockout - no ignition
8 flashesLockout - too many flame dropouts
9 flashesIncorrect line voltage phasing
LED offNo power to control or control hardware fault

All Allied Furnace error codes →

Allied code LED on: homeowner questions

What does Allied code LED on mean?

Normal operation. Steady LED on the control means the board is powered and running normally.

Is it safe to keep using my furnace with code LED on?

Usually yes. Code LED on is normally minor, but if it keeps coming back have it checked.

Can I reset Allied code LED on myself?

You can try one reset (power off for 30 seconds, then on). If Allied code LED on comes back, the cause is still there and a licensed technician should check it.

Who can fix Allied code LED on near me?

Aurora Star Tech Inc. repairs Allied furnaces in Vaughan, Toronto and across the GTA. Call (647) 657-2977 or book a service call online.

Homeowner help: Furnace Not Turning On: What to Check · Furnace Blinking Light: What the Flash Codes Mean

Troubleshooting guides

Source: Allied 506724-01 (Issue 1108) A95UH/A93UH/95G1UH/92G1UH Installation Instructions, Diagnostic Codes p.53. Written in our own words as a summary; always check the original manual.

General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.

© 2026 Aurora Star Tech Inc. All rights reserved. This page may not be copied, republished or used to train other systems without written permission.

Emergency Furnace Repair

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