How Long Do Furnaces and Heat Pumps Last? (Repair or Replace)
Typical lifespans for every common system in Willamette Valley homes, the signs yours is wearing out, and how to get the most years out of it.
The Short Answer: 15 to 20 Years for a Furnace, 10 to 15 for a Heat Pump
A gas furnace typically lasts 15 to 20 years. A heat pump typically lasts 10 to 15 years because it heats and cools, so it runs most of the year. Yearly maintenance is the biggest factor in which end of the range you get.
Typical Lifespan by System
| System | Typical Lifespan | In Oregon |
|---|---|---|
| Gas furnace | 15 to 20 years | Well-maintained furnaces in mild Valley winters often reach the high end. |
| Heat pump | 10 to 15 years | Runs year-round for heating and cooling, so it works more hours than a furnace. |
| Central air conditioner | 15 to 20 years | Short Oregon cooling seasons are easy on AC compressors. |
| Ductless mini-split | 15 to 20 years | Inverter compressors ramp up and down instead of cycling hard. |
Not sure how old your system is? Check the data plate inside the furnace door or on the side of the outdoor unit. The manufacture date is often coded into the serial number, and we can read it for you on any visit.
6 Signs Your System Is Wearing Out
It's in the age range
A furnace past 15 years or a heat pump past 12 is on borrowed time, even if it still runs. Plan the replacement before it fails in January.
Repairs every season
One repair is normal. A new part every fall and winter usually means the whole system is wearing out.
Uneven heat
Some rooms hot, others cold, or the system runs constantly and never reaches the set temperature.
Energy bills creeping up
Worn parts and dirty heat exchangers make the system run longer for the same comfort.
Yellow or flickering burner flame
A healthy gas flame is steady blue. Yellow can mean incomplete combustion. Have it checked.
New noises or smells
Banging, squealing or grinding, or a burning smell that doesn't fade after the first run of the season.
Repair or Replace?
Repair usually makes sense when
- The system is under about 12 years old
- It's a single failed part, like an igniter, capacitor or flame sensor
- It has been reliable until now
Replacement usually makes sense when
- The system is past 15 years
- It needs repairs every season
- The heat exchanger is cracked
- You also want air conditioning (a heat pump does both)
Cracked heat exchanger = stop using the furnace. It can leak carbon monoxide into your home. Keep working CO detectors on every level.
Weighing a heat pump against a new furnace? Read our heat pump vs. gas furnace guide for Oregon. If your system has stopped working right now, start with our 9 fixes for a furnace blowing cold air.
How to Make Your System Last Longer
- Change the filter. Every 1 to 3 months. A clogged filter makes the blower and heat exchanger work harder.
- Get a yearly tune-up. Furnaces in the fall, heat pumps in the fall and spring. Small problems get caught before they break something bigger.
- Keep the outdoor unit clear. Two feet of space around a heat pump or AC. Rake leaves away and keep shrubs trimmed.
- Don't crank the thermostat. Big swings make the system run long, hard cycles. Steady settings are easier on every part.
System Lifespan FAQs
How long do furnaces last in Oregon?
Most gas furnaces last 15 to 20 years. Willamette Valley winters are mild, so a furnace that gets a yearly tune-up and regular filter changes often reaches the high end of that range.
How long does a heat pump last?
Most heat pumps last 10 to 15 years. They heat in winter and cool in summer, so they run more hours per year than a furnace. Annual maintenance and clean coils help them reach the high end.
Should I repair or replace my furnace?
Repair makes sense when the system is under about 12 years old and the problem is a single part. Replacement makes sense when it's past 15 years, needs repairs every season, or has a cracked heat exchanger. A technician can show you what they found so you can decide.
Is a cracked heat exchanger dangerous?
Yes. A cracked heat exchanger can leak carbon monoxide into your home. If a technician finds one, the furnace should be shut off until it's replaced. Keep working CO detectors on every level of your home.
Not Sure How Much Life Your System Has Left?
Valley Flow inspects furnaces and heat pumps across Silverton, Salem, Keizer, Woodburn, Stayton and Mt. Angel. We show you what we find and tell you straight whether it's worth repairing.