York Replacement Thermostats and High Limits

When control and efficiency are your top priorities for your HVAC system, consider the York thermostats available at Parts Town. When you need temperatures to stay in the right range and not let spaces get too hot or cold, these parts are here to help. Check out our variety of York thermistors here at Parts Town. We offer only genuine, OEM parts so you know that you can rely on them for maintenance and repairs. They will fit seamlessly with your system and keep your spaces at optimal temperatures.

What is The Difference Between a Thermostat and a Hi-Limit Switch in an HVAC system?

The roles of the thermostat and the hi-limit switch are both separate and interdependent in an HVAC system. The thermostat is tasked with temperature regulation, controlling the heating or cooling system to ensure the environment matches the set temperature preferences. The hi-limit switch, meanwhile, is a device that interrupts the system's operation if the temperature reaches dangerously high levels, thereby safeguarding against overheating risks.

What are Signs That an HVAC Hi-Limit Switch has Tripped Or Failed?

A tripped or malfunctioning HVAC hi-limit switch can manifest as the heating system prematurely turning off before hitting the set temperature, or the system failing to activate altogether. A tripped hi-limit switch suggests the system might have overheated, potentially from limited airflow, a clogged filter or various mechanical problems.

Why is The HVAC System Not Maintaining The Set Temperature On The Thermostat?

HVAC systems that struggle to meet set temperatures can often be traced back to thermostats — whether they're miscalibrated, poorly located or simply too old and in need of a swap. Beyond thermostat-related issues, the root of the problem may be with the HVAC system itself, including filters choked with dirt restricting airflow, leakage in ductwork causing air to seep out or a mismatch between the system's capacity and the size of the space it's regulating.