Furnace Repair in Portland, OR

Portland’s older neighborhoods hide their heating systems in basements, and a lot of those basements have been through three or four generations of equipment. Gravity furnaces became forced air conversions, ducts got extended and rerouted, and the result is a modern furnace pushing air through a distribution system designed for a completely different era.

AM/PM Heating & Cooling repairs furnaces, heat pumps, air handlers, and ductless systems for Portland homeowners and businesses. We are a family owned, locally operated company built on long term relationships, and every heating repair is backed by our 100% satisfaction guarantee.

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Why Homeowners in Portland, OR Trust Us

Ben came over for quick seasonal service for my furnace and AC units. From schedule to finish, it was done in 4 business days with a reasonable price. During the service, he was able to point out weaker refrigerant and capacitor that might need attention in next summer season. Thank you.

Ben was very thorough and explained the process patiently. It was a pleasure working with him. He pointed out an electrical switch near the a/c unit that had loose wires (not his job but he pointed it out anyways) and I appreciated his concern and I will fix it.

Ben was fantastic. He was a pleasure to talk to, he knew exactly what he was doing, and he took the time to explain everything to me. Next time I need service I will be calling and asking for him specifically

Clues Your Furnace Is About to Quit

Older homes make heating trouble easy to normalize. These are the signs worth taking seriously:

Uneven heat between floors
Furnace short cycling repeatedly
Rattling or clanking ducts
Visible soot or scorching
Bills climbing every winter
Air that feels stuffy
Ignition problems at startup
Detector alarms going off

If any of these sound familiar, a diagnostic visit is worth far more than another season of guessing.

Century Old Houses and Modern Heating Equipment

Conversion ductwork causes most of what we find in Portland’s older housing. Systems built around a gravity furnace relied on big, slow moving trunks, and attaching a modern blower to that layout produces uneven airflow, noisy registers, and rooms that never quite catch up. Undersized returns are the most common single flaw, and they lead to overheating, limit trips, and a shortened heat exchanger life.

Winter inversions add an air quality dimension. When cold air settles over the city and holds, wood smoke and vehicle exhaust concentrate near the ground, and a home with leaky ducts and a poor filter setup pulls that inside. Households notice it as stale air, extra dust, and worse symptoms for anyone with allergies.

Then there is plain vintage. Furnaces tucked into cramped basements often go years without service simply because they are out of sight. Ignitors, flame sensors, inducer motors, and blower bearings wear on schedule regardless, and a system nobody looks at is the one that fails on the coldest night.

Careful Furnace Repair in Older Portland Homes

Old houses reward patience, so our technicians take the time to see the whole picture. We test ignition components, the flame sensor, gas valve, pressure switch, inducer, and limit circuit, then evaluate blower performance, static pressure, venting, and heat exchanger condition. In converted systems we pay particular attention to return air, because that is usually where the real fault lives.

You get the explanation and the price before we begin. If a duct correction would do more for your comfort than a new furnace, we will tell you that even though it is the smaller job.

We also service thermostats, replace filters, repair ductwork, and install air purifiers and UV lights for homes that struggle with indoor air quality during inversion season. Emergency heating repair is available.

A Long Night in the Montavilla Neighborhood

Priya in the Montavilla neighborhood called in December because her furnace kept shutting down before the house reached temperature, sometimes several times in an evening.

Our technician found a converted duct system with a single undersized return and a filter slot packed tight, which was overheating the exchanger and tripping the high limit. He cleaned the burners and flame sensor, fitted a properly sized filter, and opened an additional return path to restore airflow.

The furnace held full cycles that night and the upstairs finally warmed up. Priya said the house felt noticeably less drafty within a week.

What Sets Our Heating Service Apart

Here is what sets our heating service apart:

Family owned, locally operated
Licensed, bonded, and insured
Skilled with older home systems
100% satisfaction guarantee
Authorized American Standard dealer
BBB accredited business
Airflow and duct expertise
Indoor air quality solutions
Emergency heating repair

We would rather fix the cause than keep treating the symptom.

Frequently Asked Questions

Why does my furnace shut off before the house warms up?

In older homes this is usually a high limit trip caused by restricted return air. A dirty filter, undersized return, or blocked duct will do it.

Can old converted ductwork be improved without replacing it?

Often yes. Adding return capacity, sealing joints, and correcting register sizing can make a large difference without tearing out the system.

My basement furnace has never been serviced. Where do I start?

Start with a full tune up and safety inspection. That establishes what condition the system is in and catches worn parts before winter.

What can I do about stale indoor air during winter?

Better filtration, an air purifier, UV light at the coil, and sealing leaky ducts all help, especially during inversion season when outdoor air quality drops.

Do you work on homes that have no ductwork?

Yes. Ductless mini splits provide heating and cooling without ducts and are a strong fit for older Portland homes.