We just wrapped up a furnace limit switch repair for a home in South Pasadena, CA. The homeowner's existing system was consistently tripping because of the old safety limit switch. That resulted in the shutdown of their heating system. After identifying the issue, our HVAC tech had the situation under control. So we fitted a new limit switch and adjusted the electrical connections. Next, we calibrated the settings to ensure the limit switch could seamlessly communicate with the furnace's control board. After that, we ran a few tests to guarantee the heating system was back on track. Our Pioneers Heating and Air team is proud to have provided this client with a reliable, efficient, and safe heating system!
Keeping your furnace in top condition is vital for ensuring the safety and efficiency of your home's heating system. One important component that makes this possible is the limit switch, a specially designed device that helps regulate temperatures within a furnace. When working properly, the limit switch ensures your furnace will not get too hot or cool, reducing the risk of danger or malfunction. With its critical function, it is important to understand how this device works and why it should be regularly inspected and maintained.
The furnace limit switch is one of your furnace's most important safety features. The limit switch is located just beyond the heat exchanger. It is constructed with a long temperature-sensitive probe connected to a metallic mounting platform. This base is attached to the blower fan motor and the gas valve. Its main purpose is to prevent your furnace from overheating, which could result in significant damage or even fire risk.
The limit switch will shut off the power to the furnace when it detects the temperature is too high. That helps protect your home and your family by preventing potential accidents. However, if your furnace limit switch is malfunctioning, have it inspected and serviced immediately. A skilled HVAC technician can quickly diagnose the problem and get your system back up and running safely again.
The following are common signs that a limit switch should be replaced:
Is your furnace not providing you with consistent heat? It may be due to a broken limit switch. A limit switch helps your furnace regulate the temperature in your home, but when it fails, it cannot accurately maintain the desired set point. This results in an inconsistent supply of heat and an imbalance in the temperature of each room in your home. If you suspect your limit switch is causing this problem, contact a qualified HVAC technician immediately.
Are you feeling the chill in your home even though you have not changed your thermostat? Does your furnace seem to keep turning off too soon? That could be a sign of a broken limit switch. The limit switch is designed to shut down the furnace automatically if it reaches unsafe temperatures. If it is not working correctly, your furnace will frequently cycle on and off, making your home temperature unreliable and hard to keep comfortable. Make sure to consult with a professional HVAC technician if you suspect the limit switch needs replacing.
Is your furnace giving off a burning smell? It could be due to a broken limit switch. The limit switch is a safety device that prevents the furnace from getting too hot. When it breaks, it can cause the heat exchanger, fan, and other components to become too hot and give off a burning odor. You should turn off your furnace immediately and call a professional HVAC technician to inspect and repair the problem.
Are you dealing with an unreliable heating system and fed up with finding dependable HVAC technicians to fix it? Look no further. At Pioneers Heating and Air, we are more than just a contractor—we are your trusted partner in HVAC repair in South Pasadena, CA, and the surrounding areas. With decades of experience, BBB-rated customer service, and the latest tools, our licensed technicians can handle any air conditioning or furnace repair job quickly and efficiently. Call us today to ask for a free estimate or schedule a service call.