HVAC Relays, Furnace Pressure Switches & Controls in Dallas, TX

Relays and pressure switches are essential safety and control components in HVAC systems. When a furnace will not ignite, a compressor will not engage, or a system is throwing error codes, a failed relay or pressure switch is often the cause. Open To Public HVAC Parts stocks these critical components from Supco and other manufacturers at our Dallas store — walk in, grab what you need, and get the system running again.

Furnace Pressure Switches

Furnace pressure switches are safety devices that verify proper draft before allowing ignition. When an inducer motor creates negative pressure in the heat exchanger, the pressure switch closes to confirm venting is working correctly. We stock pressure switches for popular furnace brands in common pressure ratings. Bring in your old switch or furnace model number for an exact match.

Relays & Control Components

Our relay inventory includes fan relays, time-delay relays, potential relays, start relays, and general-purpose switching relays. These components handle the electrical switching that coordinates compressors, fan motors, and heating elements. We carry Supco and other trusted brands with common voltage and amperage ratings ready for pickup.

Related Components

Find everything for your repair in one stop: capacitors and contactors, motors and blower wheels, Supco electrical components, and thermostats.

Store Location & Hours

Address: 10226 Plano Road, Suite 104, Dallas, TX 75238
Phone: 214-340-9421 (call or text)
Hours: Monday–Friday 10am–7pm | Saturday 10am–3pm | Closed Sunday

Serving techs and homeowners across Garland, Richardson, Mesquite, Plano, and the DFW metroplex.

Frequently Asked Questions

How do I know if my furnace pressure switch is bad?

Common symptoms include your furnace starting the inducer motor but failing to ignite, error codes flashing on the control board, or the furnace locking out after several failed ignition attempts. A multimeter can test whether the switch is closing properly. Our staff can help you identify the right replacement.

Do you carry relays for mini-split systems?

We stock relays for conventional split systems and furnaces. For mini-split specific components, call us at 214-340-9421 to check current availability or discuss special-order options.