The short answer
When an AirEase furnace in Northern Virginia won’t heat, check the thermostat, the power switch, the gas and the filter, then read the light. An AirEase furnace runs a set lighting sequence and tries five times before it locks out for an hour. The red light’s blink count, or the E-code on newer models, tells you which step failed. Concord furnaces use the matching G model numbers and the same tables.
If you smell gas, skip all of it. Leave the house and call the gas company and 911 from outside. If a carbon monoxide alarm is going off, get everyone out first (what to do when the CO alarm sounds).
AirEase models and their displays
Allied Air builds AirEase, and AirEase shares its A model numbers and manuals with Armstrong Air. The 2026 AirEase lineup is the A801EK, A802EK, A802VK, A931EK, A961EK, A972EK, A972VK and A98MVK. Concord’s matching list is the 80G1EK, 80G2EK, 80G2VK, 92G1EK, 96G1EK, 97G2EK and 97G2VK.
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| What you see through the door window | Examples | What it is |
|---|---|---|
| One red light, up to 9 flashes | A801D, A951A, A952V | Older 9-flash table |
| One red light, up to 13 flashes, slow heartbeat when idle | A96UH1E (2022), A951E (2023) | 13-flash table |
| A small number display, E and three digits | A97MV, A972V, and 2026 K models like the A96UH1EK | E-codes |
Every code in all three tables is in Armstrong Air furnace codes, which applies to AirEase as written.
The $67 Heating Check
We check your furnace, heat pump or boiler before winter. Through December 31. See the offer
How it lights, and where it stops
Allied’s manual gives the sequence: the inducer starts, the pressure switch proves it, a 15-second purge, a 20-second igniter warm-up, then a 4-second try with the gas on. Five tries in all. Then the control locks the gas out and repeats the whole thing after 60 minutes. Moving the thermostat from Heat to OFF and back to Heat starts it over sooner.
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| What you see and hear | Where it stopped | Codes to look for |
|---|---|---|
| Inducer hums, then the furnace shuts down | The pressure switch didn’t close | 9-flash 3 or 6, 13-flash 9, E223, E227 |
| Inducer runs, igniter never glows | The igniter or its circuit | 13-flash 3 then 5, E290 |
| Igniter glows, gas clicks, no flame | Gas supply or the gas valve | 9-flash 7, 13-flash 3, E270 |
| Burners light, then go out | The flame sensor | 9-flash 8, 13-flash 4, E273 |
| Burners shut off, blower keeps going | A limit opened | 9-flash 4, 13-flash 7, E250 |
The red light: heartbeat, codes and memory
On a 13-flash board, a slow, steady blink (1 second on, 1 off) is the heartbeat, and it’s normal. A code is a group of quick flashes, a pause, then the group again; count one group. No light means no power or a board fault. The board keeps the last 10 codes: a quick press of its button replays them, and holding it more than 5 seconds erases them.
On the E-code models, a soft lockout lasts 60 minutes and a hardware fault waits 5. E200 is a hard lockout: it stays off until the power is cycled.
A rollout trip means flame came out of the burner area. Allied’s service flowchart clears it by cutting the power or cycling the thermostat off for 3 seconds, but a second trip needs a tech, not another reset.
What to check before you call
- Thermostat on Heat, set a few degrees warmer than the room.
- Furnace switch on, breaker on, and the doors on and seated.
- Gas on at the meter, and the valve on the pipe into the furnace lined up with the pipe.
- A clean filter. Allied’s manual says a dirty one makes the limit shut the furnace off.
- Outside, the vent pipes clear of snow, leaves and nests.
- Water near the furnace means a drain problem (condensate drain clogs).
Photo the code, then reset once. Move the thermostat from Heat to OFF, wait a few seconds, and back to Heat. Take a photo of the code before you reset anything. A reset can clear what’s showing, and that number saves the tech time and you money.
What it usually turns out to be
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| The cause | How a tech confirms it | Our price |
|---|---|---|
| Cracked igniter | Resistance out of range, or no glow | $240 to $410 |
| Dirty flame sensor | Burners drop out, flame signal low | $95 to $180 |
| Clogged condensate drain | Water backed up, pressure switch open | $175 to $420 |
| Pressure switch, inducer or vent | Pressures measured, vent checked | Priced in writing |
| Blower wheel packed with dust | Limit trips, weak airflow | $300 to $440 |
| Control board | Good inputs, wrong outputs | $550 to $1,180 |
The diagnostic is a flat $99, and the price comes in writing before we start. Ducane owners: Ducane furnace troubleshooting.
Our heating check is $67 per system, through December 31: furnace, heat pump or boiler. On a furnace, for $229 (regularly $467) we also pull the blower wheel and clean it blade by blade.
If the repair is a big one on an older furnace, get a second look before you spend it. Our free second opinion costs you nothing, and the estimator shows what a new system costs with $1,500 off already in the price.
Codes and warning lights from every brand, in one place: furnace and AC error codes.
Call or book a furnace repair
Call (703) 997-9757. We answer day or night. Or book online and pick a time. The diagnostic is a flat $99, and you see the repair price in writing before we touch anything. Furnace running fine and you want to keep it that way? Book the $67 heating check from goswiftpro.com/cookiesoffer (book by November 30) and a box of warm cookies comes with the visit. Rated 5.0 stars across 1,138 reviews on Google, Angi, Yelp, the BBB and Facebook, Virginia Class A license 2705192276. We work on Armstrong Air, AirEase, Ducane and Concord furnaces all over Northern Virginia: furnace repair.
Questions people ask
How do I reset an AirEase furnace?
Move the thermostat from Heat to OFF and back to Heat. That restarts the lighting sequence. The furnace also retries on its own 60 minutes after an ignition lockout.
Why is the light on my AirEase furnace blinking?
A slow, steady blink is the normal heartbeat. A group of quick flashes with a pause between groups is a code; count one group and match it to your model’s table.
Who makes AirEase furnaces?
Allied Air. AirEase shares its model numbers and manuals with Armstrong Air, and Concord and Ducane use the matching G model numbers.
How long does an AirEase furnace stay locked out?
After five failed tries to light, it waits 60 minutes and tries again on its own. On E-code models a hardware fault waits 5 minutes. An E200 hard lockout stays off until the power is turned off and back on.
