Yukon LWO-112 furnace Parts

Most oil furnaces average 15 to 20 years of service life; with consistent annual maintenance and timely repairs, many run 20 to 25 years. For a Yukon LWO-112 furnace, lifespan depends most on burner condition, heat exchanger health, and clean fuel delivery.

• Schedule a professional tune-up yearly (before the heating season).
• Replace or clean the oil filter and fuel nozzle on schedule.
• Keep the air filter clean so airflow stays strong.
• Confirm the draft and venting are correct to prevent sooting.
• Address small issues early (hard starts, rumbling, odors, short cycling).

• Frequent lockouts, resets, or no-heat calls
• Soot around the burner area or persistent smoky odor
• Rising fuel use with the same thermostat settings
• Unusual noises (boom on ignition, rumble, vibration)
• Repeated repairs to the same system (burner, ignition, fuel delivery)

Oil furnaces can keep running past the average, but efficiency and reliability usually drop as the burner and heat exchanger age. Staying ahead of maintenance helps your Yukon LWO-112 heat more cleanly, reduce nuisance shutdowns, and avoid expensive damage from sooting or overheating.

If you are tracking down a failure or planning a refresh (filters, ignition parts, burner service items), start with the parts list for your Yukon LWO-112, or search by model on Sears PartsDirect. For DIY electrical checks during troubleshooting, we recommend using a meter safely and following a proven test process like how to use a multimeter to test electrical parts video.

Last updated: February 2026

On the Yukon LWO-112 furnace, the most common “failure” we see is a maintenance or wear item causing a safety shutdown or poor heat output; the top culprits are a dirty or incorrect air filter, a weak draft/venting condition, or oil-burner ignition and flame-proving components (if your unit is equipped with an oil burner). Use the parts list to match your exact configuration, then search by model on Sears PartsDirect.

• Air filter: Restricted airflow can overheat the furnace and trip a limit, causing short cycling.
• High-limit control or fan/limit control: Opens on overheating; often triggered by airflow or blower issues.
• Blower motor or capacitor (if equipped): Weak airflow leads to overheating and nuisance limit trips.
• Oil burner nozzle and oil filter (oil-fired setups): Plugging causes hard starts, rumbling, smoke, or no-heat.
• Ignition transformer/electrodes (oil burner): No spark or weak spark causes no ignition.
• Cad cell flame sensor (oil burner): Fails to “see” flame; burner locks out.

• Install a clean filter of the correct size and airflow rating.
• Confirm the blower compartment door is fully closed and the service switch is on.
• Check the breaker and any furnace-mounted fuse; use a meter if needed.
• If oil-fired: verify oil supply is on, oil line is not kinked, and the burner is not in lockout.
• Check venting and combustion air openings for blockage; poor draft causes shutdowns and soot.

Most “part failures” on furnaces are actually protection controls doing their job. Fixing airflow, draft, and burner tune prevents repeat shutdowns, reduces soot, and protects major components.

Last updated: February 2026

For the Yukon LWO-112 furnace, the most common repairs are the same high-frequency fixes we see on many furnaces: restoring airflow, correcting thermostat and low-voltage control issues, fixing power problems, and servicing the blower and safety switches. These repairs address the most common “no heat” and “short cycling” complaints.

• Airflow restrictions: replace a dirty filter, open blocked registers, clear return-air obstructions
• Thermostat and low-voltage controls: tighten/repair thermostat wiring, replace a failing thermostat, correct a shorted control wire
• Power supply faults: reset a tripped breaker, replace a blown fuse, repair a loose connection at the service switch
• Blower problems: replace a weak blower motor capacitor, repair/replace a failing blower motor, adjust/replace a belt (if equipped)
• Safety switch trips: address the cause of a limit or rollout trip (airflow and venting are common root causes)

• Turn off power at the furnace switch or breaker before removing access panels.
• Replace the air filter; confirm supply and return vents are open.
• Set the thermostat to HEAT and raise the set temperature above room temperature.
• Check the breaker and any furnace fuse; replace fuses only with the same rating.
• If electrical testing is needed, follow a proven test method and use the right tools.

Airflow, power, and control issues cause most nuisance shutdowns. Fixing them early prevents repeated overheating trips, reduces wear on the blower system, and helps the furnace heat more consistently.

For parts lookup and ordering by model number, use the parts list for your Yukon LWO-112 or search on Sears PartsDirect. For electrical troubleshooting basics, we recommend how to tell if a fuse is blown.

Last updated: February 2026

For a Yukon LWO-112 furnace, the most expensive repair is typically a major core component that takes significant labor to access and set up, most often the heat exchanger or the blower motor/assembly. The final price is usually driven by labor and diagnosis as much as the part.

These repairs usually create the biggest total bill on many furnaces (including units like the Yukon LWO-112) because the parts are costly and the work time is longer:

• Heat exchanger replacement
• Blower motor or complete blower assembly replacement
• Control board or ignition control replacement
• Draft inducer motor replacement (on induced-draft systems)
• Gas valve replacement

Use this checklist to keep an expensive repair from turning into an unnecessary repair:

• Confirm the rating plate model is LWO-112 before ordering anything.
• Start with the symptom: no heat, short cycling, weak airflow, or won’t start.
• Check basics first: power switch, breaker, door switch, thermostat call for heat.
• If you’re testing electrical circuits, use a meter and follow safe practices; see how to use a multimeter to test electrical parts video.
• Compare the repair cost to the furnace’s overall condition and maintenance history.

High-cost furnace repairs are usually expensive because access, diagnosis, and setup take time. A correct diagnosis protects your budget and helps restore dependable heat.

To look up replacement parts by model and compare options, search Yukon LWO-112 on Sears PartsDirect.

Last updated: February 2026