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.
HH18HA452 – MANUAL LIMIT SWITCH (MICRO, LARGE BASE, L250°)
$26.00
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.
10226 Plano Rd, Suite 104, Dallas TX 75238
Questions? Call or text (214) 340-9421
Mon–Fri 10 am – 7 pm | Sat 10 am – 3 pm
Description
If your furnace is short-cycling (turning on and off repeatedly), a failed limit switch may be the cause. This Carrier OEM manual reset limit switch opens at 250°F. Used as a flame rollout safety switch — if flames roll out of the burner area, this switch kills power. Manual reset requires pressing the button to restart.
Specs: Opens at 250°F, manual reset, micro size with large base, SPST
Replaces: HH18HA452
Fits: Carrier, Bryant, and Payne furnaces that call for part number HH18HA452. Bring your model number — we’ll match it at the counter.
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.
