Field Controls HVAC Pressure Switch

Field Controls HVAC Pressure Switches: Safety at the Heart of Combustion

When a furnace or boiler fires up, a pressure switch is the silent guardian standing between normal operation and a potentially dangerous fault. Field Controls — a brand with roots going back to 1927 — brings that same commitment to combustion safety that made it the world's leading supplier of draft controls, draft regulators, and vent dampers to its line of HVAC pressure switches. These compact but critical devices verify that adequate airflow is present before allowing ignition, protecting both equipment and occupants.

Purpose-Built for Power Venters and Combustion Systems

Field Controls pressure switches are not generic components. They are engineered as OEM-matched replacements for specific Field Controls power venter and combustion air systems. The model 602602003, for example, is a purpose-built replacement designed specifically for the PVG-600 Power Venter, ensuring that the switch's calibrated set point precisely matches the system it monitors. Similarly, model 602602002 is a single-pole, single-throw (SPST) device designed for reliable monitoring and control of air pressure in HVAC systems, with compression connections for secure installation. Other pressure switches in the lineup, such as model 46363500, are matched to the CAS-6 and CAS-7 combustion air systems, and model 46273100 is specified for CK43-43F/CK61-63 control kits and CAS3-4 power venters.

Why Field Controls Pressure Switches Stand Apart

The value of a Field Controls pressure switch comes directly from the company's deep expertise in combustion engineering. Field Controls combustion products are engineered to manage airflow, maintain proper draft, and ensure the safe expelling of combustion gases — and pressure switches are an integral part of that safety chain. Because these switches are designed in-house alongside the power venters and control kits they serve, each component's set point and form factor are matched with precision that aftermarket alternatives cannot always replicate.

Field Controls combustion systems are designed to ensure that harmful exhaust gases, such as carbon monoxide, are safely vented outdoors, with built-in safety features that help prevent unsafe operating conditions. A correctly functioning pressure switch is essential to that design: if the venter motor fails or airflow is obstructed, the switch interrupts the ignition sequence, stopping the appliance before combustion gases can back up into the living space.

A Trusted OEM Source for HVAC Professionals

With over 95 years of continuous refinement in combustion, venting, and air treatment technology, Field Controls has built a customer base that spans original equipment manufacturers, thousands of wholesale distributors, and HVAC contractors across the United States. For technicians servicing Field Controls power venters, specifying a genuine Field Controls pressure switch is the straightforward path to restoring factory-calibrated performance. Explore the full Field Controls brand catalog or browse all HVAC pressure switches to find the right replacement for your system.