Lennox Furnace E228 Error Code: Inducer Motor Fault
Quick Answer
Lennox furnace E228 is an inducer motor fault. The inducer (draft blower) failed to start, stalled during operation, or is not meeting speed requirements detected by the control board. Start by checking the run capacitor on the inducer motor, which is a common and inexpensive fix.
E228 shuts your Lennox furnace down before it even tries to ignite. No inducer spin, no heat. And I've shown up to half these calls this winter only to find a bad capacitor, which is a $15 part. So don't panic and don't let anyone sell you a $400 motor before you've done the cap test. Five minutes. If the fan won't turn by hand though, it's a different story.
Multimeter with capacitance (MFD/uF) setting, Clamp meter for running amperage
What Does the E228 Code Mean?
When your Lennox board flashes E228, it means the brain isn't seeing the inducer fan hit the right RPM. While a dead motor is a possibility, I always check the small run capacitor first. It's a cheap part that often mimics a costly motor failure, so don't rush into buying the whole assembly until you've tested that cap.
Most Likely Causes
Based on aggregated repair data, here is the probability breakdown for this error code:
Run capacitor failure preventing inducer motor from starting40%
Inducer motor winding failure or seized bearings24%
Control board not providing correct operating voltage to inducer22%
E228 flashing on the control board display when the thermostat calls for heat
Furnace is completely silent on a heat call because the inducer doesn't even try to spin up
You hear the inducer hum loudly for a few seconds but it doesn't actually start rotating, which is a classic dead capacitor symptom
Inducer starts briefly then quits with a grinding or high-pitched squealing noise
No heat and no other fault codes showed up before E228 hit the display
Can you reset a Lennox furnace to clear the E228 code?
To clear the code after a repair, cycle the main furnace power switch or the circuit breaker for thirty seconds. Once power is restored, the control board performs a self-test. If the inducer ramps up to speed during the next call for heat, the code will vanish from the display. If it stays, the board still detects a mechanical or electrical drag.
Tools Required for Diagnosis
Multimeter with capacitance (MFD/uF) settingClamp meter for running amperageInsulated screwdriver (for discharging capacitor before touching terminals)Phillips #2 screwdriverFlathead screwdriverFlashlightShop vacWork gloves
Diagnostic Checklist
Follow these steps in order. We start with the easiest external fixes before opening up the machine.
Replacement Parts
If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.
Part Name
OEM Number
Estimated Price
Lennox Inducer Motor Assembly10L77 · $90–$200
10L77
$90 – $200
Inducer Run CapacitorCPT00968 · $15–$30
CPT00968
$15 – $30
Frequently Asked Questions
Can I replace just the inducer motor on a Lennox SL280V or do I need the full assembly?
You can sometimes find just the motor, but honestly it's a losing battle. These Lennox housings are plastic and the gaskets almost always tear during disassembly. By the time you've swapped the wheel and motor, you might have a leak at the collector box. Buying the full assembly means the pressure ports and condensate drains are factory sealed, which saves you a massive headache later. And the full assembly usually isn't that much more expensive than just the motor once you factor in labor.
How do I know if the Lennox inducer motor or the capacitor is the problem?
The manual spin test is your best friend. If the motor's hard to turn by hand, it's mechanically dead and no capacitor will fix it. If it spins perfectly free but only hums when you give it power, the capacitor's lost its ability to kickstart the motor. Always test the cap with a meter before you buy anything. A weak capacitor is a 15-minute fix. Swapping the whole motor assembly is a two-hour job minimum, so it's worth spending two minutes to rule the cap out first.
Why is the Lennox SL280V inducer motor a common failure point?
These high-efficiency Lennox furnaces are great, but they're genuinely tough on inducer motors. The motor runs in a pretty hostile environment, constantly pulling slightly acidic condensate through the venting system. If your drain line gets even a little backed up, that water sits in the inducer housing and eats the bearings from the inside out. Keeping your condensate trap clean every season actually extends the life of this motor by years. It's one of those five-minute maintenance things that people skip and then regret when December hits.
How much does it cost to replace the inducer motor on a Lennox furnace?
For a genuine Lennox assembly, you're looking at $100 to $250 for the part depending on BTU size. Hire a pro and the total bill usually lands between $350 and $550. It's a pretty straightforward job if you're handy with basic tools, but pull the exact OEM part number off your furnace's data plate before you order anything. These assemblies vary by model and BTU rating and getting the wrong one is a frustrating mistake that costs you return shipping fees.
What happens if I run my Lennox furnace with a weak inducer motor?
Running it with a failing inducer is asking for a cold house. The motor will eventually stop completely, or it could overheat and take the control board out with it, which turns a $150 repair into a $400 one. If you're seeing E228 and the motor sounds rough or is struggling to start, it's telling you it's on its last legs. Don't wait until it's 15 degrees out and the furnace won't start at all. That's when you're paying emergency rates to whoever answers the phone.