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HVAC limit switches monitor system temperatures and prevent overheating. Replacing faulty furnace, boiler, or water heater limit switches ensures safe operation, protects equipment, and maintains reliable heating performance.
-13%Johnson Controls A25CN-1 SPDT High Limit Manual Reset 25°F to 215°FSpecial Price $183.04 Regular Price $210.50Out of stock
-23%York S1-025-31830-000 SPDT Limit Switch 105°F Open 165°F CloseSpecial Price $41.20 Regular Price $53.56
-23%Rheem-Ruud 47-104990-01 SPST Limit Switch 125°F-145°F 3” InsertSpecial Price $18.88 Regular Price $24.54
-23%Carrier HH18HA211 SPST Auto Rollout Limit Switch 225°F Open 175°F CloseSpecial Price $15.05 Regular Price $19.56- -23%York S1-025-43201-000 SPST Limit Switch 26°F-38°FSpecial Price $45.46 Regular Price $59.10Out of stock
- -23%York S1-025-22273-003 SPST A/R Limit Switch 160°F Open 120°F CloseSpecial Price $49.55 Regular Price $64.41
- -13%York S1-025-38901-000 SPST Auto Reset Limit Switch 55°F Open- 45°F CloseSpecial Price $60.17 Regular Price $69.20
- -13%
- -23%Rheem-Ruud 47-23113-03 SPST Auto Reset N/C Limit Switch 190°F-Open 150°F-CloseSpecial Price $24.36 Regular Price $31.67
HVAC Limit Switch Replacement Components for Safety Systems
HVAC limit switch replacement parts are essential safety components that help protect heating equipment from overheating and unsafe operating conditions. These devices monitor system temperature and automatically shut down burners or heating elements if temperatures exceed safe levels.
In heating systems, furnace limit switches monitor internal temperatures and control blower fan operation to maintain proper airflow and prevent overheating. Similarly, a boiler high limit switch ensures that boiler water temperatures remain within safe limits, protecting the system from excessive heat and potential damage.
]A water heater high limit switch performs a similar function by shutting off heating elements when water temperature rises beyond safe levels. Signs of a failing switch may include frequent system shutdowns, overheating, or inconsistent heating performance. Timely HVAC limit switch replacement helps restore safe temperature control, protect system components, and ensure reliable heating performance across residential and commercial HVAC systems.
At PartsHnC, we offer manual reset limit switches, auto reset limit switches, thermal limit switch open, and primary limit switches. Compatible with trusted brands like Lennox, Amana-Goodman, Trane, Reznor, York, and Carrier for reliable HVAC safety and performance.
FAQs
What does an HVAC limit switch do?
An HVAC limit switch monitors system temperature and shuts off the burner or heating element if temperatures exceed safe limits.
When should an HVAC limit switch be replaced?
If the system frequently overheats, shuts down unexpectedly, or shows inconsistent heating, the limit switch may need replacement.
Are limit switches used in different heating systems?
Yes, limit switches are commonly used in furnaces, boilers, and water heaters to maintain safe temperature control.
What causes a furnace limit switch to fail?
Common causes include overheating, restricted airflow, dust buildup, worn contacts, or normal wear over time.
Can a bad limit switch stop a furnace from running?
Yes, a faulty limit switch can shut down the furnace to prevent overheating and protect the system from damage.