The short answer
Troubleshooting a Ducane furnace in Northern Virginia starts with the basics: the thermostat on Heat and set warmer than the room, the furnace switch and breaker on, the gas on, the filter clean, and the doors on tight. If it still won’t heat, read the code. Ducane’s G models (80G, 92G, 95G, 96G and 97G) blink a red light or show an E-code, and the code tells you whether it’s the igniter, the flame sensor, the pressure switch or the limit.
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).
The checklist from Ducane’s own manual
Ducane’s installation manuals print a “Failure To Operate” list. Here it is, in order, minus the parts meant for the installer:
- Is the thermostat calling for heat? Heat mode, set a few degrees warmer than the room.
- Are the access panels on and seated? A panel off its switch shuts the furnace down.
- Is the disconnect switch on? It looks like a light switch, by the furnace.
- Is there a tripped breaker or a blown fuse?
- Is the filter dirty? The manual says plainly that “dirty or plugged filters will cause the limit control to shut the unit off.”
- Is the gas on at the meter?
- Is the shutoff valve on the gas pipe into the furnace open? The handle should line up with the pipe.
- Is the furnace in lockout? Move the thermostat from Heat to OFF and back to Heat.
Looking for the manual? Ducane’s furnace site is ducanehvac.com. Current Ducane furnaces carry G model numbers like 80G1EK, 92G1EK, 96G1EK and 97G2VK. If the sticker inside your door doesn’t match anything in the table, snap the label and send it when you call, and we’ll match it.
The $67 Heating Check
We check your furnace, heat pump or boiler before winter. Through December 31. See the offer
Read the code
Allied Air builds Ducane, and Ducane’s G models share manuals with Armstrong Air’s A models. Which code system you have depends on the model and year:
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| Ducane model | Display |
|---|---|
| 80G1, 92G1, 95G1 (older) | Red light, codes up to 9 flashes |
| 95G2V two-stage | Red light, up to 9 flashes, plus a green high-heat light |
| 96G1UHE (2022), 95G1E (2023), 80G1E | Red light, codes up to 13 flashes |
| 2026 K models like 96G1UHEK, 80G2UHVK, 97G2UHVK | Number display, E-codes |
Here’s where the common problems land in each system:
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| Problem | 9-flash | 13-flash | E-code |
|---|---|---|---|
| No ignition, locked out | 7 | 3, then 5 | E270 |
| Flame drops out | 8 | 4 (low flame signal) | E273 |
| Pressure switch | 2, 3, 6 | 9, 10, 11 | E223, E224, E227 |
| Limit open | 4 | 7 | E250, E274 |
| Rollout switch | 5 | 8 | E200 (hard lockout) |
| Igniter circuit | E290 |
Every code, model by model, is in Armstrong Air furnace codes; the tables are the same for the matching Ducane G numbers. Pressure switch codes get their own page: pressure switch codes and fixes.
How a Ducane resets, and when it won’t
After five tries to light, the furnace locks out and tries again on its own in 60 minutes. Heat to OFF and back to Heat interrupts the wait. On the E-code models, a hardware fault waits 5 minutes. E200 is a hard lockout and stays off until the power is cycled.
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. The 13-flash boards keep the last 10 codes; holding the board’s button more than 5 seconds erases them, so leave that to the tech. And if the code is the rollout switch, don’t keep resetting it. It trips when flame comes out of the burner area.
The common Ducane fixes
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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 light and drop out, flame signal low | $95 to $180 |
| Clogged condensate drain | Water backed up, pressure switch open | $175 to $420 |
| Blower wheel packed with dust | Limit trips, weak airflow | $300 to $440 |
| Pressure switch, inducer or vent | Pressures measured, vent checked | Priced in writing |
| Control board | Good inputs, wrong outputs | $550 to $1,180 |
| Blower motor | Won’t start, or starts and quits | $670 to $2,400 |
Most blower motors land around $1,500; the spread is a standard motor against a variable-speed one. The diagnostic is a flat $99, and the price comes in writing before we start.
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
Why is my Ducane furnace not heating?
Start with the thermostat on Heat and set warmer than the room, the furnace switch and breaker on, the gas on, a clean filter and the doors on tight. If it still won’t heat, read the code through the door window.
How do I reset my Ducane furnace?
Move the thermostat from Heat to OFF and back to Heat. The furnace also retries on its own 60 minutes after an ignition lockout. A hard lockout needs the power turned off and back on.
Who makes Ducane furnaces?
Allied Air, which also builds Armstrong Air, AirEase and Concord. Ducane’s G models share their manuals and code tables with Armstrong’s matching A models.
Is a Ducane the same as an Armstrong Air?
Close. A Ducane 96G1UHE and an Armstrong A96UH1E share one manual and one code table. The name on the door differs.
