Amana Furnace Blower Fan Won’t Turn Off in Greater Vancouver — Causes & Repair

An Amana furnace whose blower simply will not stop is one of those problems that sounds serious but is usually a controls issue. In most Greater Vancouver homes the culprit is a thermostat setting or a safety device doing exactly what it should. The fan running around the clock is annoying and pushes up your electricity bill, but in several cases it is the furnace protecting its own heat exchanger.

Draw one distinction first: a blower that runs on for a minute or two after the burners shut off is normal — it is purging the last of the heat. A blower that never stops, across cycle after cycle, is the fault we are solving. Amana furnaces run Daikin‘s control platform, and constant-blower behaviour follows a predictable short list of causes.

ROMA Heating & Cooling has handled constant-blower calls on Amana furnaces across Vancouver, Burnaby, Richmond and the North Shore since 1999. Here are the likely causes, safe checks, and when to call a licensed technician.

Most likely causes of an Amana blower that won’t turn off

Thermostat fan set to ON

By far the most common reason, and the easiest fix. On the ON setting, the blower runs continuously by design, independent of heat calls. Safe check: set the fan to AUTO; if the blower stops soon after, that was it. Some homeowners run ON deliberately for circulation and filtration, which is perfectly fine and not a fault.

High-limit switch holding the blower on

The high-limit keeps the furnace from overheating. When it senses excess heat — usually from restricted airflow — it keeps the blower running to cool the heat exchanger even after the burners stop. A limit stuck closed, or repeatedly tripping, holds the fan on. Safe check: replace a dirty 1" filter and open blocked registers; the limit itself is a technician repair.

Stuck fan relay or control-board fault

The blower is switched by a relay on the Amana control board. If it welds closed or the board fails, the blower gets power continuously. Safe check: none internal — a tech tests the relay and board.

Fan-off delay set long, or wiring

A long fan-off delay setting or a fan-circuit (G terminal) wiring fault — sometimes after a thermostat swap — can keep the blower energized. A technician checks the settings and low-voltage wiring.

Blower-won’t-stop quick-reference

📞 Talk to a licensed ROMA furnace technician — (604) 704-0300

Safe things to try once

Start at the thermostat: set the fan to AUTO and lower the setpoint below room temperature to end the heat call, then wait a few minutes for any normal purge to finish. Replace a dirty 1" filter and open blocked registers to rule out an airflow-driven limit. Cycle furnace power once. If the blower stops and stays off on AUTO, you have solved it. If it runs continuously even on AUTO with the thermostat satisfied, stop — that points to a relay, board or limit issue for a licensed technician. Never remove or bypass the high-limit switch to stop the blower; it is a safety device.

How ROMA pinpoints an Amana blower that won’t quit

Our technician’s first move is to separate a controls issue from a safety-driven one. We check the thermostat’s fan configuration and the fan-off delay setting on the Amana board, then watch the blower relay: does it de-energize cleanly when the heat call ends, or is it stuck feeding the motor? A welded relay holds the blower on no matter what the thermostat says, and it is an affordable part to replace once we have confirmed it is the culprit rather than guessed.

If the relay drops out correctly but the blower keeps running, the high-limit is likely holding the fan on to cool an overheating heat exchanger — which points to airflow, not just a switch. We measure static pressure and temperature rise to find whether a restrictive filter, a blocked or undersized return, or a worn blower wheel is the real driver. In Metro Vancouver condos and townhomes, returns often get blocked by storage or furniture in cramped mechanical closets, so restoring airflow frequently settles the blower for good instead of replacing a limit that would trip again. We tell you plainly whether it is a settings change or a genuine repair.

When you call (604) 704-0300, have this ready:

• The furnace model and serial number.
• Whether the blower runs in every mode or only after a heat cycle.
• Your thermostat fan setting — ON or AUTO — and whether switching it helps.
• Whether a new thermostat was recently installed by another trade.

It is rarely urgent, but a blower running around the clock adds up on your hydro bill, so it is worth resolving promptly.

When it’s an emergency

A constantly running blower is rarely an emergency by itself, but the safety rules still apply. If you smell gas, leave the home, call FortisBC emergency and 911 from outside, and do not touch switches. If a CO alarm sounds or anyone feels unwell, get everyone out and call 911. If the running blower smells hot or electrical, or you notice burning, shut the furnace off at the switch and call us — a continuously energized motor can overheat.

Repair vs. replace

A stuck relay, failed limit or thermostat fix is a routine, cost-effective repair on any Amana. If your furnace is well past its expected service life and the board is failing alongside other worn parts, it can be worth comparing repair against a high-efficiency upgrade — BC rebates may help. We will give you the honest numbers rather than push a replacement.

Keeping the blower from running non-stop

Most constant-blower problems on an Amana are prevented by a couple of simple habits. Know your thermostat first: on AUTO the fan runs only during heat cycles, while ON runs it continuously by design — a valid choice for air circulation, but worth understanding so a setting is never mistaken for a fault. Then stay ahead of airflow, because the limit-driven version of this problem begins with restricted airflow overheating the heat exchanger. Change the 1" filter on schedule, keep supply and return registers open, and keep the return clear of stored items in a cramped Metro Vancouver mechanical closet.

The relay side is harder to prevent because relays wear out with cycles, but an annual tune-up catches a relay starting to stick and a limit tripping more often than it should, before either leaves your blower stuck on. If another trade has recently swapped your thermostat, it is worth having the fan wiring confirmed, since a miswired fan terminal is a common cause of a suddenly constant blower. Our technicians check the relay, limit circuit and thermostat wiring during routine service so the blower shuts off when the heat call ends, keeping your hydro bill from quietly climbing.

Why ROMA for Amana furnaces in Vancouver

ROMA Heating & Cooling is a TSBC-licensed gas contractor (Gas licence LGA0202903), bonded, insured and Red Seal-trained, rated 4.8 stars from 221 Google reviews. We test the fan relay, limit circuit, board and thermostat wiring — and check the fan-off delay setting — to find why your Amana blower won’t quit, with upfront flat-rate pricing and no hidden fees. Estimates on installs are free, 0% financing is available OAC, and we work seven days a week. See our furnace repair service or book a free estimate.

We serve Vancouver, Burnaby, Richmond, Surrey, Coquitlam, New Westminster, the North Shore and the Fraser Valley. Constant-blower calls are common in strata townhomes and condos where thermostats get changed by different trades over the years. Call (604) 704-0300. Ask about our maintenance plans to keep airflow and limits healthy, or check current rebates if you’re considering an upgrade.

Frequently Asked Questions

Why does my Amana furnace blower run constantly?

The most common reason is the thermostat fan set to ON instead of AUTO, which runs the blower continuously by design. If it’s on AUTO and still won’t stop, likely causes are a high-limit switch holding the blower on due to restricted airflow, or a stuck fan relay on the control board. Check the thermostat first, then call ROMA at (604) 704-0300.

Is running my Amana furnace fan all the time harmful?

Running the fan on ON for circulation and filtration is a valid choice and not harmful, though it uses more electricity. The concern is when the blower won’t stop even on AUTO with the thermostat satisfied — that indicates a relay, board or limit fault worth diagnosing rather than leaving to run.

Can a dirty filter make my Amana blower run non-stop?

Indirectly, yes. A clogged filter restricts airflow, overheats the heat exchanger, and causes the high-limit switch to keep the blower running to cool it down. Replacing a dirty 1-inch filter and clearing blocked registers often resolves airflow-driven blower issues.

Could the fan-off delay setting keep my Amana blower running?

A long fan-off delay will keep the blower running a while after the burners stop, but it should still shut off. If the blower truly never stops on AUTO, the cause is more likely a stuck relay, a failing board, or a limit holding it on. A technician can check the delay setting and the relay together.

Does ROMA repair Amana blower and fan problems in Greater Vancouver?

Yes. ROMA Heating & Cooling diagnoses and repairs constant-blower and fan issues on Amana furnaces throughout Vancouver, Burnaby, Richmond, Surrey and the North Shore. We are TSBC-licensed, bonded and insured. Call (604) 704-0300 for prompt service seven days a week.

Reviewed by the ROMA Heating & Cooling team — TSBC-licensed gas contractor (Gas LGA0202903), serving Greater Vancouver since 1999. Updated July 2026.

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