MML250 – MANUAL LIMIT SWITCH (MICRO, 250°)
SKU · PRL250
$14.97
Manual reset micro limit switch, opens at 250°F. Push-button reset after trip. Replaces Supco SRL250 and Packard PRL250. Universal fit for furnaces and unit heaters.
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Showing 1–48 of 62 results
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UNIVERSALS1-025-35362-000 – LIMIT SWITCH (3″, L200°, ODD BASE)
SKU · S1-02535362000$89.00York S1-025-35362-000 auto reset limit switch, opens at 200°F, closes at 170°F. 3-inch insertion, odd base. OEM for York furnaces.
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UNIVERSALHH18HA507 – AUTO LIMIT SWITCH (MICRO, LARGE BASE, L185°)
SKU · L185$26.66Carrier HH18HA507 auto reset limit switch, opens at 185°F, closes at 145°F. Large base, micro size. OEM replacement for Carrier, Bryant, and Payne furnaces.
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UNIVERSALSLS180 – AUTO LIMIT SWITCH (MICRO, L180°)
SKU · MAL180$15.01Supco SLS180 auto reset micro limit switch, opens at 180°F, closes at 140°F. Crosses to Nordyne 626563 and 626614. Universal fit for furnaces and heaters.
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UNIVERSALAT013 – ADJUSTABLE DISC LIMIT SWITCH (175° to 215°)
SKU · ELE-AT013$22.91Supco AT013 adjustable disc limit switch, 175°F to 215°F range. SPST open-on-rise. Crosses to Nordyne 626487R and PT013. Universal fit for furnaces.
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UNIVERSALSHL516 – HIGH TEMPERATURE LIMIT SWITCH (3″, L210°)
SKU · SHL516$35.02Supco SHL516 high limit switch, 3-inch insertion, opens at 210°F, closes at 170°F. Auto reset. Crosses to Carrier HH12ZB210, Rheem 47-102473-04, and more.
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UNIVERSALHH12ZB260 – HIGH LIMIT SWITCH (3″, L260°)
SKU · HH12ZB260$40.34Carrier HH12ZB260 high limit switch, 3-inch insertion, opens at 260°F. Auto reset. Crosses to Trane SWT01261. For Carrier, Trane, and other brand furnaces.
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UNIVERSALS1-02532606000 – LIMIT SWITCH (3″, ODD BASE, L210°)
SKU · S1-02532606000$45.04York S1-02532606000 high limit switch, 3-inch insertion, odd base, opens at 210°F, closes at 180°F. OEM auto-reset limit for York furnaces.
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UNIVERSALHH12ZB140 – HIGH LIMIT SWITCH (3″, L140°)
SKU · HH12ZB140$35.18Carrier HH12ZB140 high limit switch, 3-inch insertion, opens at 140°F. Auto reset. Crosses to Supco SHL507, Trane SWT01276. Universal 3-inch L140 replacement.
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UNIVERSALAT012 – ADJUSTABLE DISC LIMIT SWITCH (135° to 175°)
SKU · ELE-AT012$22.91Supco AT012 adjustable disc limit switch, 135°F to 175°F range. SPST open-on-rise. Crosses to E144 and PT012. Universal fit for furnaces and heating equipment.
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UNIVERSALMML230 – MANUAL LIMIT SWITCH (MICRO, 230°)
SKU · PRL230$14.97Manual reset micro limit switch, opens at 230°F. Push-button reset after trip. Universal replacement for Supco SRL230 and Packard PRL130. Fits most residential furnaces.
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UNIVERSALMML220 – MANUAL LIMIT SWITCH (MICRO, 220°)
SKU · PRL220$14.97Manual reset micro limit switch, opens at 220°F. Push-button reset after trip. Universal replacement — fits most furnaces and heaters using a micro-base L220 switch.
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HONEYWELL5D51-78 – FAN & LIMIT CONTROL (11″)
SKU · 5D51-78$167.57Honeywell L4064B2210 fan and limit control with 11-inch element. Adjustable fan differential and fixed high-limit safety cutoff. For older furnaces without electronic controls.
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UNIVERSALSHL517 – HIGH TEMPERATURE LIMIT SWITCH (3″, L220°)
SKU · HH12ZB220$35.14Supco SHL517 high limit switch, 3-inch insertion, opens at 220°F, closes at 180°F. Auto reset. Crosses to Carrier HH12ZB220 and Lennox 29M75.
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UNIVERSALB1370108 – MANUAL LIMIT SWITCH (MICRO, LARGE BASE, L300°)
SKU · B1370108$19.60Goodman B1370108 manual reset rollout limit switch, opens at 300°F. Large base, micro size. OEM safety switch for Goodman/Amana furnaces.
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UNIVERSALSLS300 – AUTO LIMIT SWITCH (MICRO, L300°)
SKU · MAL300$15.25Supco SLS300 auto reset rollout switch, opens at 300°F, closes at 250°F. Compact micro size with angled terminals. Used as a flame rollout safety switch.
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UNIVERSALSHL509 – HIGH TEMPERATURE LIMIT SWITCH (3″, L240°)
SKU · SHL509$35.14Supco SHL509 high limit switch, 3-inch insertion, opens at 240°F, closes at 210°F. Auto reset. Crosses to Carrier HH12ZB240. Universal furnace replacement.
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UNIVERSALHH18HA499 – AUTO LIMIT SWITCH (MICRO, LARGE BASE, L165°)
SKU · HH18HA499$24.44Carrier HH18HA499 auto reset limit switch, opens at 165°F, closes at 125°F. Large base, micro size. Crosses to HH18HA169, HH18HA508, 20162903. OEM Carrier part.
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UNIVERSAL47-25349-03 – HIGH TEMPERATURE LIMIT SWITCH (3″, ODD BASE, L150°)
SKU · 47-25349-03$29.48Rheem 47-25349-03 high limit switch, 3-inch insertion, odd base, opens at 150°F. Auto reset. OEM replacement for Rheem and Ruud furnaces.
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UNIVERSALMML260 – MANUAL LIMIT SWITCH (MICRO, 260°)
SKU · PRL260$14.97Manual reset micro limit switch, opens at 260°F. Push-button reset after trip. Replaces Supco SRL260 and Packard PRL260. Universal fit for residential furnaces.
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UNIVERSALSHL515 – HIGH TEMPERATURE LIMIT SWITCH (3″, L200°)
SKU · SHL515$35.14Supco SHL515 high limit switch, 3-inch insertion, opens at 200°F, closes at 160°F. Auto reset. Crosses to Carrier HH12ZB200. Universal furnace replacement.
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UNIVERSALB1370115 – HEAT KIT LIMIT SWITCH (L150°)
SKU · B1370115$23.64Goodman B1370115 heat kit limit switch, opens at 150°F. Protects electric heat strips in Goodman/Amana air handlers from overheating. OEM replacement part.
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UNIVERSALHH18HA505 – LIMIT SWITCH
SKU · L235$23.59Carrier HH18HA505 auto reset limit switch, opens at 235°F, closes at 195°F. OEM replacement for Carrier, Bryant, and Payne furnaces.
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UNIVERSALMML135 – MANUAL LIMIT SWITCH (MICRO, 135°)
SKU · PRL135$14.97Manual reset micro limit switch, opens at 135°F. Push-button reset after trip. Universal replacement for Supco SRL135 and Packard PRL135. Common in furnaces and unit heaters.
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UNIVERSALSLS160 – AUTO LIMIT SWITCH (MICRO, L160°)
SKU · MAL160$15.01Supco SLS160 auto reset micro limit switch, opens at 160°F, closes at 120°F. Compact design with angled terminals. Universal fit for furnaces and unit heaters.
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UNIVERSALSLS150 – AUTO LIMIT SWITCH (MICRO, L150°)
SKU · MAL150$15.01Supco SLS150 auto reset micro limit switch, opens at 150°F, closes at 110°F. Compact design with angled terminals. Universal fit for furnaces and unit heaters.
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UNIVERSAL1370912S – HIGH LIMIT SWITCH (7″, L240°)
SKU · 1370912S$47.09Goodman 1370912S high limit switch with 7-inch insertion, opens at 240°F. OEM replacement for Goodman/Amana furnaces. Replaces older part 1370912.
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UNIVERSALHH18HA461 – MANUAL LIMIT SWITCH (MICRO, LARGE BASE, L160°)
SKU · HH18HA461$25.61Carrier HH18HA461 manual reset limit switch, opens at 160°F. Large base, micro size. Also crosses to HH18HA167. OEM for Carrier, Bryant, and Payne systems.
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UNIVERSALAT014 – ADJUSTABLE DISC LIMIT SWITCH (210° to 250°)
SKU · ELE-AT014$22.91Supco AT014 adjustable disc limit switch, 210°F to 250°F range. SPST open-on-rise. Crosses to PT014. Universal fit for furnaces and heating equipment.
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HONEYWELL5D51-90 – FAN & LIMIT CONTROL (8″)
SKU · 5D51-90$163.37Honeywell L4064B2236 fan and limit control with 8-inch element. Adjustable fan differential and fixed high-limit safety cutoff. For older furnaces without electronic controls.
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UNIVERSALMML240 – MANUAL LIMIT SWITCH (MICRO, 240°)
SKU · PRL240$14.97Manual reset micro limit switch, opens at 240°F. Push-button reset after trip. Universal replacement for Supco SRL240 and Packard PRL240. Fits most furnaces and heaters.
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UNIVERSALSHL518 – HIGH TEMPERATURE LIMIT SWITCH (3″, L250°)
SKU · SHL518$35.14Supco SHL518 high limit switch, 3-inch insertion, opens at 250°F, closes at 210°F. Auto reset. Crosses to Carrier HH12ZB250. Universal furnace replacement.
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UNIVERSALSHL508 – HIGH TEMPERATURE LIMIT SWITCH (3″, L190°)
SKU · SHL508$35.14Supco SHL508 high limit switch, 3-inch insertion, opens at 190°F, closes at 170°F. Auto reset. Crosses to Carrier HH12ZB190 and Trane SWT01259.
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UNIVERSALHH18HA449 – MANUAL LIMIT SWITCH (MICRO, LARGE BASE, L350°)
SKU · HH18HA449$36.67Carrier HH18HA449 manual reset limit switch, opens at 350°F. Large base, micro size. Used as a flame rollout switch on Carrier, Bryant, and Payne furnaces.
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UNIVERSALSWT02173 – MANUAL LIMIT SWITCH (TEAR DROP, L310°)
SKU · SWT02173$19.81Trane SWT02173 manual reset limit switch, opens at 310°F. Teardrop mount. Used as a flame rollout safety switch on Trane and American Standard furnaces.
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UNIVERSALHH12ZB160 – HIGH LIMIT SWITCH (3″, L160°)
SKU · SWT01257$41.90Carrier HH12ZB160 high limit switch, 3-inch insertion, opens at 160°F. Auto reset. Crosses to Trane SWT01257. For Carrier, Bryant, Payne, and Trane furnaces.
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RHEEM47-22860-02 – AUTO LIMIT SWITCH WITH ANTICIPATOR (RHEEM, L110°)
SKU · 47-22860-02$28.60Rheem 47-22860-02 auto reset limit switch with built-in anticipator, opens at 110°F. Replaces 47-22860-06. OEM for Rheem and Ruud furnaces.
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UNIVERSALHH18HA416 – MANUAL LIMIT SWITCH (MICRO, LARGE BASE, L215°)
SKU · L215$27.18Carrier HH18HA416 manual reset limit switch, opens at 215°F. Large base, micro size. OEM replacement for Carrier, Bryant, and Payne furnaces.
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HONEYWELL5D51-35 – FAN & LIMIT CONTROL (5″)
SKU · L4064B2228$161.37Honeywell L4064B2228 fan and limit control with 5-inch element. Adjustable fan differential and fixed high-limit safety cutoff. For older furnaces without electronic controls.
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UNIVERSALHH12ZB150 – HIGH LIMIT SWITCH (3″, L150°)
SKU · HH12ZB150$39.47Carrier HH12ZB150 high limit switch, 3-inch insertion, opens at 150°F. Auto reset. Crosses to Trane SWT01280. For Carrier, Bryant, Payne, and Trane furnaces.
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UNIVERSALHH18HA452 – MANUAL LIMIT SWITCH (MICRO, LARGE BASE, L250°)
SKU · HH18HA452$26.00Carrier HH18HA452 manual reset rollout limit switch, opens at 250°F. Large base, micro size. OEM flame rollout switch for Carrier, Bryant, and Payne furnaces.
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UNIVERSAL626458R – DOUBLE STACK LIMIT SWITCH (L190°)
SKU · 626458$42.58Nordyne 626458R double-pole limit switch, opens at 190°F. Dual-stack design for Nordyne, Miller, and Intertherm furnaces. Also listed as 626458.
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UNIVERSALHH18HA493 – AUTO LIMIT SWITCH (MICRO, WIDE MOUNT, L200°)
SKU · HH18HA493$23.88Carrier HH18HA493 auto reset limit switch, opens at 200°F, closes at 101°F. Wide mount, micro size. Crosses to 1176902. OEM for Carrier, Bryant, and Payne.
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UNIVERSALSLS200 – AUTO LIMIT SWITCH (MICRO, L200°)
SKU · MAL200$15.01Supco SLS200 auto reset micro limit switch, opens at 200°F, closes at 160°F. Compact design with angled terminals. Universal fit for furnaces and unit heaters.
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UNIVERSALSHL525 – HIGH TEMPERATURE LIMIT SWITCH (7″, L180°)
SKU · SHL525$35.14Supco SHL525 high limit switch, 7-inch insertion, opens at 180°F, closes at 160°F. Auto reset. Universal 7-inch probe replacement for furnaces.
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UNIVERSAL47-104990-04 – HIGH TEMPERATURE LIMIT SWITCH (3″, ODD BASE, L150°)
SKU · 47-104990-04$34.19Rheem 47-104990-04 high limit switch, 3-inch insertion, odd base, opens at 150°F. Auto reset. OEM replacement for Rheem and Ruud furnaces.
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RHEEM47-22860-01 – AUTO LIMIT SWITCH WITH ANTICIPATOR (RHEEM, L105°)
SKU · 47-22860-01$34.34Rheem 47-22860-01 auto reset limit switch with built-in anticipator, opens at 105°F. OEM for Rheem and Ruud furnaces. Low-temp cutoff for heat pump applications.
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UNIVERSALHH18HA148 – AUTO LIMIT SWITCH (MICRO, LARGE BASE, L150°)
SKU · HH18HA148$23.61Carrier HH18HA148 auto reset limit switch, opens at 150°F. Large base, micro size. Crosses to 20162904S. OEM for Carrier, Bryant, and Payne systems.
Showing 48 of 62 parts
Signs You May Need a New Limit Switch
Limit switches are safety devices inside your furnace that monitor temperature. The high-limit switch shuts off burners if the heat exchanger gets too hot. The fan limit switch controls when the blower turns on and off.
Furnace Shuts Off Before Home Reaches Temperature▼
- The furnace lights and runs but shuts off after a few minutes.
- The high-limit switch may be tripping due to overheating.
- Common causes: dirty filter restricting airflow, failed blower motor, or a faulty switch.
Always check the air filter first. A clogged filter is the #1 reason a high-limit switch trips.
Blower Fan Won't Turn On or Won't Turn Off▼
- The furnace heats but the blower never starts to distribute warm air.
- Or the blower runs continuously and won't shut off after the heating cycle.
- The fan limit switch controls blower timing — when it fails, blower behavior becomes erratic.
Furnace Short-Cycles Repeatedly▼
- The furnace starts, runs for a few minutes, shuts off, then restarts.
- This continuous cycling often means the limit switch is tripping on high temperature.
- If the filter is clean and the blower is working, the limit switch itself may be faulty.
Not sure which part you need? Bring your old part to our Dallas store — our team will test it for free and help you find the right replacement.
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📞 (214) 340-9421Mon–Fri 10 am – 7 pm | Sat 10 am – 3 pm