Explore quality options in HVAC/R relays at F.W. Webb. A relay switch is magnetically operated and turns equipment on and off by opening and closing circuits, typically in a heating, ventilation, air conditioning, or refrigeration system. Made in durable cast aluminum or brass, the pressure, relay, and rollout switches in our collection can withstand the normal daily operation of an HVAC/R system. Use our convenient filters to sort the control relays and switches by end connection, size, voltage, and electrical rating. Browse sturdy HVAC/R relays from trusted makers Source 1, Resideo, Mars, Supco, White Rodgers, and Functional Devices to find the right match for an existing unit.
Some of the issues that can cause a rollout switch to trip include a clogged exhaust vent, low gas pressure, or a clogged or cracked heat exchanger.
A common use for a relay switch is to control circuit small currents or compact devices.