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Lennox Furnace Repair in Portland Metro

We repair Lennox furnaces. Get help with no heat, repeated shutdowns, failed starts, unusual noises or rooms that stay cold.

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One Local Team for Heating, Cooling, Plumbing, Electrical & Appliance Services

HVAC & Appliance Repair Guys provides repair, maintenance, replacement and installation services for homes and businesses.

We inspect your system or appliance, explain our findings, and review the recommended work and price before starting. Availability depends on your service needs, location, site access, parts, permits and our schedule.

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Professional Lennox Furnace Repair in Portland Metro

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35,000+ Jobs Completed Repairs, maintenance and installations for homes and businesses
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Same-Day Service in Portland Metro

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Special offer in October 2026Special Offer
in October 2026

Furnace Replacement. Special offer ends October 31, 2026. Standard: 80% efficiency, from $4,815. High Efficiency: 96% efficiency, from $5,480. Premium Comfort: 96% variable-speed, from $6,990.

Lennox Furnace Repair in Portland Metro

HVAC & Appliance Repair Guys provides Lennox furnace repair in Portland Metro. We assess a furnace that stops heating, runs without keeping the home warm or changes its airflow. The current complaint and installed model guide the visit.

Our furnace repair service covers the general process. Lennox equipment also needs the right control context. A product-family name alone does not identify every heating stage, blower or control arrangement in the home.

Variable Output and a Real Loss of Heat

The Lennox SLP99V is an example of a furnace with modulating heat and a variable-speed motor. Those are different functions. Changing heat output and moving air at different speeds can both affect what you notice during normal use.

Tell us whether room warmth has changed, rather than judging the furnace only by its sound or run time. A longer run may fit one model’s operation. It still needs review when the home no longer keeps up with the heating request.

Control Alerts and the Equipment Match

The S40 control supports selected digitally enabled Lennox furnaces, including the SLP99V. That does not make it the control for every Lennox installation. We identify the installed equipment before interpreting a message or assuming a communicating-system fault.

Share the wording visible on the normal wall-control screen and whether heat continued. Leave settings and wiring unchanged for the assessment. The alert helps describe a condition. It does not automatically identify a failed board or prove a need for a new thermostat.

Starts, Stops and Intermittent Trouble

A furnace that does nothing is different from one that briefly heats and then stops. Describe the pattern you have already noticed. You do not need to open equipment or repeat a reset to show an internal operating sequence.

If heat returns at times, mention that along with any recent service or control change. These details can guide the review without proving the cause. We distinguish the history of the complaint from findings that support a particular repair.

When Airflow and an Alert Change Together

A message may appear around the same time as weaker airflow. That timing does not prove the control caused the air-delivery problem. We assess the furnace response and the reported change together, instead of treating one symptom as the whole diagnosis.

Tell us whether the change affects the whole home or a room that has always been cooler. Repairing the current breakdown may not address that older room-comfort concern, which may need separate attention.

Lennox Furnace Repair, Maintenance and Replacement

Our furnace maintenance service covers planned care. A recurring loss of heat needs fault assessment, so describe the active problem when arranging service and review routine-care tasks separately.

If you want to compare a system change, our Lennox furnace installation covers replacement planning. We explain the repair findings and options first. The age or name of the furnace alone does not settle the decision.

Model Details and Repair Findings

Share the model if you already know it or can read it without opening equipment. A short description of what changed and any normal-display message are useful too. Leave connected parts in place; you do not need to gather internal readings.

We explain the finding, proposed work and any further assessment needed. Parts depend on the actual model and fault. After the agreed repair, we check the relevant operation against the complaint and explain any separate concern.

Frequently Asked Questions

Does an S40 message mean every Lennox furnace uses the same controls?

No. The control applies to supported equipment. We review the actual furnace and connected components before using model-specific expectations to interpret the problem.

Can a fan change be normal even when the home feels colder?

The model may vary its fan operation normally, but changed room comfort still needs review. Describe both observations so the assessment addresses the heating result as well as the sound or airflow.

Do I need to clear the alert before scheduling?

No. Share the message already visible on the normal screen and describe what happened to heating. There is no need to enter service settings or force the furnace through another cycle.

Request Lennox Furnace Repair in Portland Metro

Contact HVAC & Appliance Repair Guys to request Lennox furnace repair and discuss the model, installed controls and change in room warmth.

For Lennox furnace repair in Portland Metro, call HVAC & Appliance Repair Guys or submit a service request through the form on this page.

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Same-Day Service in Portland Metro

Leave your name and phone number. We’ll call to discuss the service you need, confirm your location and check appointment availability.

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Installation & Replacement

Plan new equipment, replace an existing system, or review an upgrade for your property.

Repair & Maintenance

Get help with equipment faults, recurring problems, and care for the systems already in use.

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Appliance Repair

Repair for refrigerators, freezers, dishwashers, washers, dryers, ovens, ranges, and cooktops. We diagnose cooling, washing, drying, and cooking faults, then explain the recommended repair and price before work begins.

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Heating & Cooling

Repair, maintenance, and tune-ups for air conditioners, furnaces, heat pumps, and mini-splits. Get help with no heat, poor cooling, weak airflow, or repeated cycling, or arrange routine care for equipment already in use.

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Plumbing

Help with leaking pipes, dripping faucets, running toilets, blocked drains, and water heater faults. We identify the source and explain whether the concern needs leak detection, drain clearing, or a repair.

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Electrical

Troubleshooting for dead outlets, flickering lights, repeated circuit trips, and other power faults. We assess the affected area and explain the repair supported by the findings before work begins.

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Commercial Appliance Repair

Repair requests for selected commercial cooking, cooling, ice-making, and washing equipment. We confirm the equipment and model, review site access and operating needs, and discuss a repair plan for your business.

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Air Duct Cleaning

Cleaning for dust and debris in accessible ductwork. We review the air path and proposed scope first, since weak airflow, uneven temperatures, and persistent odors may need a separate equipment assessment.

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Whole-Home Upgrades

Plan larger plumbing and electrical projects around the condition of your home and its future needs.

Savings & Planning

Explore payment options, ask about offers, and estimate your HVAC installation budget.

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