If your furnace is short-cycling, check the filter first — a clogged filter causes the limit switch to trip. If the filter is clean, then the switch itself may be failing.
HH12ZB140 – HIGH LIMIT SWITCH (3″, L140°)
$35.18
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.
Mon–Fri 10 am – 7 pm | Sat 10 am – 3 pm | In-Store Pickup Only
Description
If your furnace is short-cycling (turning on and off repeatedly), a failed limit switch may be the cause. This 3-inch high limit switch opens at 140°F and auto-resets when the temperature drops. Crosses to multiple OEM and aftermarket part numbers.
Specs: Opens at 140°F, auto reset, 3-inch insertion, SPST
Replaces: HH12ZB140, 2702-314, 2702-314PA, SHL507, SWT01276, SWT1276
Fits: Carrier/Bryant/Payne furnaces calling for HH12ZB140; Trane/American Standard models calling for SWT01276. Also fits other brands using a 3-inch L140 high limit switch.
Need help? See our Furnace Short Cycling Guide.
In stock at Open To Public HVAC Parts in Dallas. We test parts at the counter before you buy. Call or text (214) 340-9421.
