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BCFurnace

Furnace Limit Switches

High limit switches shut the gas off when the plenum gets hotter than the furnace is designed to run, which is what stands between a restricted airflow problem and a cracked heat exchanger. Fan and disc limits also start and stop the blower at set temperatures. A limit that trips repeatedly is almost always reporting an airflow fault rather than failing on its own.

393 limit switches in stock, ready for same-day pickup at our Coquitlam warehouse or shipped worldwide. Homeowners and contractors buy at the same counter — no trade account needed.

Signs your limit switche may have failed

  • Furnace heats briefly, then shuts down while the blower keeps running
  • Repeated cycling on and off — short-cycling on limit
  • Furnace blows cold air after the burners cut out
  • Control board reports an open limit or a limit lockout

Not sure which part you need? Call 1-778-759-9864 with your furnace model number and we will confirm it before you order.

Troubleshooting guides

Your Furnace Sequence of OperationUnderstanding How Your Gas Furnace Starts and RunsFurnace Starts Then Shuts OffCommon Causes of Short Cycling and Early ShutdownBlocked Furnace FiltersIrreversible Damage RiskBlower Motor Won't StartWhen the Furnace Sequence Completes but the Blower Never RunsFurnace Shuts Down Then Restarts After 1 to 3 HoursUnderstanding Furnace Lockout and Why It Happens

Shop limit switches by brand

Lennox146York82Carrier79American Standard48Goodman40Ruud21Frigidaire10

Limit Switches we stock

Fan Limit Control 000-052 furnace replacement part

LENNOX LIMIT SWITCH, AUTO RESET, L175-40F

Part #: 000-052
In Stock
CA$44.16
7 Limit Switch 000-127 furnace replacement part

7" HIGH LIMIT SWITCH AUTO RESET L165-30F

Part #: 000-127
In Stock
CA$78.51
Fan Limit Control 000-163 furnace replacement part

LENNOX LIMIT SWITCH, AUTO RESET, L140-40F, SPDT

Part #: 000-163
In Stock
CA$68.33
Fan Limit Control 000-172 furnace replacement part

LENNOX LIMIT SWITCH, AUTO RESET, L160-40F, SPDT

Part #: 000-172
In Stock
CA$68.70
Fan Limit Control 000-173 furnace replacement part

LENNOX LIMIT SWITCH, AUTO RESET, L220-40F

Part #: 000-173
In Stock
CA$68.00
Fan Limit Control 000-187 furnace replacement part

LENNOX LIMIT CONTROL, 160 DEG F, SPST, CLOSED S

Part #: 000-187
In Stock
CA$49.99
Fan Limit Control 000-227 furnace replacement part

LENNOX LIMIT SWITCH/THERMOSTAT, WHITE LABEL, L140-30F

Part #: 000-227
In Stock
CA$51.99
Fan Limit Control 000-232 furnace replacement part

LENNOX LIMIT SWITCH, L170-30F, AUTO RESET

Part #: 000-232
In Stock
CA$52.00
Fan Limit Control 000-266 furnace replacement part

3/4" HIGH LIMIT SWITCH 215F-40F

Part #: 000-266
In Stock
CA$60.42
Fan Limit Control 000-306 furnace replacement part

LENNOX LIMIT SWITCH, AUTO RESET, L300F

Part #: 000-306
In Stock
CA$68.85
Fan Limit Control 000-317 furnace replacement part

LENNOX LIMIT SWITCH, AUTO RESET, L140-50F

Part #: 000-317
In Stock
CA$67.99
Fan Limit Control 000-318 furnace replacement part

LENNOX LIMIT SWITCH, MANUAL RESET, L160

Part #: 000-318
In Stock
CA$68.83
Fan Limit Control 000-339 furnace replacement part

LENNOX LIMIT CONTROL, AUTO RESET, 140-180F

Part #: 000-339
In Stock
CA$68.86
Fan Limit Control 000-344 furnace replacement part

LENNOX LIMIT CONTROL

Part #: 000-344
In Stock
CA$43.21
Fan Limit Control 000-353 furnace replacement part

LENNOX 100-190F AUTO LIMIT SWITCH

Part #: 000-353
In Stock
CA$68.81
Fan Limit Control 000-378 furnace replacement part

LENNOX LIMIT SWITCH, AUTO RESET, L240-30F

Part #: 000-378
In Stock
CA$205.05
7 Limit Switch 000-379 furnace replacement part

LENNOX LIMIT SWITCH, AUTO RESET, L220-30F, 7" INSERT

Part #: 000-379
In Stock
CA$145.23
Fan Limit Control 000-382 furnace replacement part

LENNOX LIMIT SWITCH, AUTO RESET, L130-20F

Part #: 000-382
In Stock
CA$68.85
Fan Limit Control 000-387 furnace replacement part

LENNOX CONTROL LIMIT 220/190F

Part #: 000-387
In Stock
CA$68.60
Fan Limit Control 000-402 furnace replacement part

LENNOX LIMIT SWITCH, AUTO RESET, L220-30F

Part #: 000-402
In Stock
CA$37.25
Fan Limit Control 000-458 furnace replacement part

LENNOX LIMIT SWITCH, AUTO RESET, L190F-30F

Part #: 000-458
In Stock
CA$68.79
Fan Limit Control 000-480 furnace replacement part

LENNOX LIMIT SWITCH, L220F

Part #: 000-480
In Stock
CA$125.49
Fan Limit Control 000-485 furnace replacement part

LENNOX LIMIT SWITCH, AUTO RESET, L150-40F

Part #: 000-485
In Stock
CA$56.32
Fan Limit Control 000-499 furnace replacement part

LIMIT SWITCH, AUTO RESET, L180-40F

Part #: 000-499
In Stock
CA$58.34
3 Limit Switch 000-550 furnace replacement part

LENNOX LIMIT SWITCH/THEMOSTAT, L215-30F, 3" INSERT LENGTH, AUTO RESET, PINK/WHITE

Part #: 000-550
In Stock
CA$68.44
Fan Limit Control 000-551 furnace replacement part

LENNOX CONTROL LIMIT BLUE/GREEN

Part #: 000-551
In Stock
CA$13.07
Fan Limit Control 000-556 furnace replacement part

LENNOX COVER-DISC

Part #: 000-556
In Stock
CA$1,037.53
Fan Limit Control 000-589 furnace replacement part

LENNOX LIMIT SWITCH, AUTO RESET, L140-40F

Part #: 000-589
In Stock
CA$68.83
Fan Limit Control 000-614 furnace replacement part

LENNOX LIMIT SWITCH, AUTO RESET, L195-40F

Part #: 000-614
In Stock
CA$68.82
Fan Limit Control 000-615 furnace replacement part

LENNOX SWITCH LIMIT (160)

Part #: 000-615
In Stock
CA$68.50
Fan Limit Control 000-648 furnace replacement part

LENNOX LIMIT SWITCH, AUTO RESET, L210-30F

Part #: 000-648
In Stock
CA$68.77
Fan Limit Control 000-710 furnace replacement part

LIMIT SWITCH/THERMOSTAT, WHITE LABEL, L180-30F

Part #: 000-710
In Stock
CA$68.55
Fan Limit Control 000-751 furnace replacement part

Limit Switch, Auto Reset, L200

Part #: 000-751
In Stock
CA$71.90
Fan Limit Control 000-773 furnace replacement part

Limit Switch, Auto Reset, L170-40F

Part #: 000-773
In Stock
CA$62.71
Fan Limit Control 000-774 furnace replacement part

Limit Switch, Auto Reset, L150-40F

Part #: 000-774
In Stock
CA$55.59
Fan Limit Control 000-828 furnace replacement part

Limit Switch/Thermostat, Blue Label, L170-40F

Part #: 000-828
In Stock
CA$55.93
Fan Limit Control 000-832 furnace replacement part

Limit Switch, Auto Reset, L200-220F

Part #: 000-832
In Stock
CA$87.74
Fan Limit Control 000-844 furnace replacement part

LIMIT SWITCH, SHORT, AUTO RESET, L190-40F

Part #: 000-844
In Stock
CA$68.16
Fan Limit Control 000-862 furnace replacement part

Limit Switch/Thermostat, L180-40F, White Label

Part #: 000-862
In Stock
CA$78.60
Fan Limit Control 000-907 furnace replacement part

Limit Switch/Thermostat, L140-15F

Part #: 000-907
In Stock
CA$56.90
Fan Limit Control 000-929 furnace replacement part

Limit Switch/Thermostat, Main, L140-30F

Part #: 000-929
In Stock
CA$65.19
Fan Limit Control 000-968 furnace replacement part

Limit Switch

Part #: 000-968
In Stock
CA$65.58
Fan Limit Control 000-974 furnace replacement part

Limit Switch/Thermostat, L200-40F

Part #: 000-974
In Stock
CA$58.08
Fan Limit Control 000-975 furnace replacement part

Limit Switch/Thermostat, L140-40F

Part #: 000-975
In Stock
CA$52.50
Fan Limit Control 001-060 furnace replacement part

LENNOX LIMIT SWITCH L170-40F, BLUE LABEL

Part #: 001-060
In Stock
CA$36.67
Fan Limit Control 001-062 furnace replacement part

LENNOX LIMIT SWITCH, L140-40F

Part #: 001-062
In Stock
CA$56.50
Fan Limit Control 001-081 furnace replacement part

LENNOX LIMIT SWITCH, AUTO RESET, 90-120F

Part #: 001-081
In Stock
CA$36.65

Image coming soon

000-560

Limit Switch/Themostat, L170-30F, 3" Insert Length, Auto Reset

Part #: 000-560
In Stock
CA$53.89

Showing 48 of 393. Pick your brand above for the full list, or browse every part by number.

Limit Switches questions

My limit switch keeps tripping. Should I just replace it?
Replace it only after you have ruled out airflow, because a limit that trips is usually doing its job. Check the filter first — a clogged filter is the single most common cause — then closed or blocked supply registers, a dirty blower wheel, a failing blower motor or capacitor, and blocked return air. Fitting a new limit without fixing the airflow just resets the clock on a real overheating problem.
What is the difference between the limit types?
High limit switches are safeties that cut the gas on overtemperature. Fan and disc limits are controls that switch the blower on and off at set temperatures. The catalog splits these several ways, but they mount and diagnose similarly, so we list them together here.
How do I pick the right temperature rating?
Match the temperature stamped on the old switch exactly — for example L200. The setpoint is matched to your heat exchanger, and fitting a higher-rated limit defeats the protection it exists to provide. Match the mounting style and the shaft length too.

Need it today in Greater Vancouver?

Call ahead and we will set the part aside at the Coquitlam counter.

1-778-759-9864Pickup details