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.
MML240 – MANUAL LIMIT SWITCH (MICRO, 240°)
$14.97
Manual 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.
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 manual reset limit switch opens at 240°F to prevent furnace overheating. After it trips, you press the reset button to bring the system back on.
Specs: Opens at 240°F, manual reset, micro size, SPST, 1/4″ quick-connect terminals
Replaces: PRL240, SRL240
Fits: Universal — works in most residential gas furnaces and heaters from Goodman, Carrier, Trane, Rheem, Lennox, York, and others that use a micro-base limit switch rated at L240.
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.
