Switches and sensors are the safety backbone of your HVAC system. Shop flame sensors, pressure switches, limit switches, sail switches, temperature sensors, and time-delay relays at our Dallas HVAC parts store.When your furnace locks out or your AC short-cycles, a faulty switch or sensor is often the culprit. Bring in the old part or your unit’s model number and we’ll get you the right match. Browse our repair tutorials for diagnostic help. Serving Dallas-Fort Worth homeowners and contractors.
Parts are in-store only — we don’t ship. Bring the old switch or sensor to the counter and we’ll match it while you wait.
Showing 49–96 of 168 results
Lennox 69W43 flame sensor replacement with 90-degree bend. Direct aftermarket fit for Lennox furnaces. Also listed as 790-801A1 and 102431-02. Single-prong Kanthal rod.
24V triple-stacked heat sequencer for Lennox electric furnaces. Thermal time delay relay that stages heating elements and fan activation.
Nortek 903600 OEM flame sensor for Nortek and Broan furnaces. Replaces older part number 632396. Ceramic insulator with stainless steel sensing rod.
Supco 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.
Supco 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.
Supco 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.
Goodman B1370108 manual reset rollout limit switch, opens at 300°F. Large base, micro size. OEM safety switch for Goodman/Amana furnaces.
Goodman B1370110 manual reset rollout limit switch, opens at 330°F. Large base, micro size. OEM flame rollout safety switch for Goodman/Amana furnaces.
Goodman B1370115 heat kit limit switch, opens at 150°F. Protects electric heat strips in Goodman/Amana air handlers from overheating. OEM replacement part.
Goodman B1370126 furnace pressure switch, -0.40″ WC. OEM replacement for Goodman furnaces. Also replaces 20055506 and R102614-01.
Goodman B1370133 furnace pressure switch, -0.35″ WC. OEM replacement for Goodman gas furnaces. Monitors inducer draft for safe ignition.
Furnace air-proving pressure switch used on Goodman/Amana equipment, recorded at a -0.85 in. W.C. setpoint.
High-temperature limit switch for Goodman/Amana equipment, recorded as a disc-type switch with a deep back and an L120 degree F opening point.
Goodman B1370176 furnace pressure switch, -0.47″ WC. OEM replacement for Goodman gas furnaces. Verifies proper inducer draft before ignition.
Goodman B1370819 furnace door safety switch. Kills power when the furnace access panel is removed. Prevents the blower and burner from running during maintenance.
High-temperature limit switch for Goodman/Amana furnaces, recorded as a 3 inch style with an L290 degree F opening point.
BG-301 primary float switch with 90-degree elbow fitting. Installs inline on your AC condensate drain line. Shuts off the system if the drain clogs to prevent overflow.
BG-101 secondary float switch with pan clip mount. Clips to the secondary drain pan and shuts off your AC if the pan fills with water. Prevents overflow damage.
Snap-disc furnace high-limit switch from the DL series; the number is the opening (cut-out) temperature in degrees F. It is a safety device that breaks the heating circuit when the plenum overheats, and a limit that keeps tripping points at restricted airflow or a failed blower rather than at the switch.
Snap-disc furnace high-limit switch from the DL series; the number is the opening (cut-out) temperature in degrees F. It is a safety device that breaks the heating circuit when the plenum overheats, and a limit that keeps tripping points at restricted airflow or a failed blower rather than at the switch.
Snap-disc furnace high-limit switch from the DL series; the number is the opening (cut-out) temperature in degrees F. It is a safety device that breaks the heating circuit when the plenum overheats, and a limit that keeps tripping points at restricted airflow or a failed blower rather than at the switch.
Snap-disc furnace high-limit switch from the DL series; the number is the opening (cut-out) temperature in degrees F. It is a safety device that breaks the heating circuit when the plenum overheats, and a limit that keeps tripping points at restricted airflow or a failed blower rather than at the switch.
Snap-disc furnace high-limit switch from the DL series; the number is the opening (cut-out) temperature in degrees F. It is a safety device that breaks the heating circuit when the plenum overheats, and a limit that keeps tripping points at restricted airflow or a failed blower rather than at the switch.
Snap-disc furnace high-limit switch from the DL series; the number is the opening (cut-out) temperature in degrees F. It is a safety device that breaks the heating circuit when the plenum overheats, and a limit that keeps tripping points at restricted airflow or a failed blower rather than at the switch.
Snap-disc furnace high-limit switch from the DL series; the number is the opening (cut-out) temperature in degrees F. It is a safety device that breaks the heating circuit when the plenum overheats, and a limit that keeps tripping points at restricted airflow or a failed blower rather than at the switch.
Snap-disc furnace high-limit switch from the DL series; the number is the opening (cut-out) temperature in degrees F. It is a safety device that breaks the heating circuit when the plenum overheats, and a limit that keeps tripping points at restricted airflow or a failed blower rather than at the switch.
SUPCO EZ Set universal air pressure switch. It proves draft or airflow before the ignition sequence is allowed to continue, and its SPDT contacts can be wired for positive, negative or differential pressure.
FPS-T inline float switch with tee and elbow fittings. Installs on your AC condensate drain line. Shuts off the system if the drain clogs. Magnetic reed design.
Rheem FSC5002U pan-mount float switch. Mounts directly to the drain pan with a magnetic float trigger. Shuts off your AC if the pan fills up. Simple and reliable.
Carrier HH12ZB140 high limit switch, 3-inch insertion, opens at 140°F. Auto reset. Crosses to Supco SHL507, Trane SWT01276. Universal 3-inch L140 replacement.
Carrier HH12ZB150 high limit switch, 3-inch insertion, opens at 150°F. Auto reset. Crosses to Trane SWT01280. For Carrier, Bryant, Payne, and Trane furnaces.
Carrier HH12ZB160 high limit switch, 3-inch insertion, opens at 160°F. Auto reset. Crosses to Trane SWT01257. For Carrier, Bryant, Payne, and Trane furnaces.
High limit switch for Carrier, Bryant and Payne equipment, recorded as a 3 inch style rated L230 degrees F. It provides over-temperature protection by opening the control circuit when the sensing element reaches the set point.
Carrier HH12ZB260 high limit switch, 3-inch insertion, opens at 260°F. Auto reset. Crosses to Trane SWT01261. For Carrier, Trane, and other brand furnaces.
Carrier HH18HA148 auto reset limit switch, opens at 150°F. Large base, micro size. Crosses to 20162904S. OEM for Carrier, Bryant, and Payne systems.
Carrier HH18HA416 manual reset limit switch, opens at 215°F. Large base, micro size. OEM replacement for Carrier, Bryant, and Payne furnaces.
Carrier 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.
Carrier HH18HA452 manual reset rollout limit switch, opens at 250°F. Large base, micro size. OEM flame rollout switch for Carrier, Bryant, and Payne furnaces.
Carrier HH18HA461 manual reset limit switch, opens at 160°F. Large base, micro size. Also crosses to HH18HA167. OEM for Carrier, Bryant, and Payne systems.
Carrier 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.
Carrier HH18HA495 manual reset limit switch, opens at 350°F. Teardrop mount. Crosses to 1177033. OEM flame rollout switch for Carrier, Bryant, and Payne.
Temperature limit switch for Carrier, Bryant and Payne furnaces, recorded in our system as style MALB with a 200 degree F setting.
Carrier HH18HA498 auto-reset limit switch. Micro size with large base, opens at 210°F. Shuts off the furnace burner if the heat exchanger gets too hot.
Carrier 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.
Automatic-reset limit switch for Carrier, Bryant and Payne furnaces, recorded as a large-base switch with an L220 degree F opening point.
Carrier HH18HA505 auto reset limit switch, opens at 235°F, closes at 195°F. OEM replacement for Carrier, Bryant, and Payne furnaces.
Carrier 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.
Carrier HK06WC069 furnace pressure switch, -0.27″ WC. OEM for Carrier, Bryant, and Payne furnaces. Replaces 1176957 and HK06WC091. Also listed as NS2-1600-00.