The pressure switch is a protective device that opens and causes the HVAC system to stop operating under certain conditions which may be harmful.. It is important that when a pressure switch is replaced, it is replaced with the exact switch. The pressure settings are very delicate and any change in the setting by installing a different switch could cause a safety issue.. Heating, ventilation, air conditioning, or refrigeration parts and accessories should only be installed by qualified technicians.. Supplying Demand replacement parts are compatible with Major Brands, but you should always verify fitment with your specific model. We have included a video in the product gallery to help you find your model number and information in the description below.. SD products come in Supplying Demand packaging..
