A furnace pressure switch is a crucial component that ensures your furnace operates safely and efficiently. However, if your furnace pressure switch keeps failing, it can lead to serious issues. Understanding the common causes and solutions can help you address the problem effectively.
Why Does My Furnace Pressure Switch Keep Failing? 7 Common Causes and Solutions
1. Stuck or Ruptured Diaphragm
The most common reason for a furnace pressure switch to fail is a stuck or ruptured diaphragm. A stuck diaphragm won't move to the required draft, while a ruptured diaphragm can cause a flapping noise.
2. Flue Obstructions
Flue obstructions can also cause the pressure switch to malfunction. If the flue is blocked, it can prevent the proper operation of the pressure switch.
3. Damaged Pressure Switch Hoses
Damaged hoses can lead to pressure switch failure. If the hoses are damaged, they may not be able to transmit the correct pressure readings to the switch.
4. Water in the Pressure Switch Housing
Water in the pressure switch housing can cause the switch to fail. Moisture can interfere with the switch's ability to detect the correct pressure.
5. Limited Lifespan
Pressure switches typically have a lifespan of around 10 years. If your furnace is older and has not had any previous issues with the pressure switch, it's likely that problems may arise soon.
6. Failure to Trigger the Gas Valve
A common problem associated with pressure switch failure is the failure to trigger the gas valve to open, even when the necessary vacuum is present. This can be due to a physically damaged diaphragm or a physical blockage within the pressure switch.
7. Back Drafting
Back drafting, where negative motor pressure causes harmful contaminants to be sucked back inside the home, can be indicated by pressure switch issues. If lukewarm air is coming into the home, back drafting may be the cause.
Continue Exploring, Consult Our Experts
Don't let a faulty furnace pressure switch leave you in the cold! Trust KINTEK, the leading laboratory equipment supplier, to provide you with high-quality pressure switches that ensure the proper functioning of your furnace. With our durable and reliable products, you can avoid unexpected shutdowns and keep your home warm and cozy. Contact us today and let us help you find the perfect pressure switch for your furnace. Stay comfortable all winter long with KINTEK!
