American Volt Radiator Fan Thermostat Switch, 1/8" NPT Brass Probe, 190°F On 175°F Off, Replacement with 12 Month Warranty & USA Business

Control your electric radiator cooling fan automatically with the Wholesale Sensors Replacement for American Volt Electric Radiator Fan Thermostat Temperature Switch with Thread-In Brass Probe. Designed for universal automotive cooling applications, this preset thermostat switch features a 1/8-inch NPT thread, a 190°F turn-on temperature, and a 175°F turn-off temperature. It is engineered as a perfect OEM-style replacement for compatible American Volt single-pin grounding thermostat applications and is built to meet or exceed original functional specifications.

American Volt identifies this style of component as a single-pin electric cooling fan grounding thermostat switch. The thermostat uses a standard NPT solid brass thread-in temperature probe and is available in several preset temperature ranges. The specific configuration represented by this Wholesale Sensors replacement is the 1/8″ NPT, 190°F ON and 175°F OFF version.

The thermostat is designed to monitor fluid temperature and automatically control the grounding side of a compatible electric fan relay circuit. When the temperature reaches approximately 190°F, the switch changes state to provide the grounding signal used by the compatible relay circuit to activate the electric cooling fan. Once the temperature falls to approximately 175°F, the thermostat switches back, allowing the fan circuit to turn off. This preset operating range eliminates the need to manually switch the cooling fan on and off during normal operation.

Universal Automotive Cooling System Compatibility

Unlike a vehicle-specific engine coolant temperature sensor, this electric fan thermostat is designed as a universal automotive component. American Volt specifically states that its products of this type are universal rather than make or model specific.

That makes the replacement suitable for a wide variety of properly configured cars, trucks, SUVs, Jeeps, hot rods, muscle cars, street rods, race cars, classic vehicles, project vehicles, engine swaps, and custom cooling systems.

Compatibility is determined by the cooling system configuration rather than vehicle year, make, and model. Before ordering, verify that your application requires a 1/8″ NPT thread, single-pin grounding thermostat switch, and 190°F ON / 175°F OFF operating range. A vehicle that requires a different thread size, two-pin switch, power-switching thermostat, or different activation temperature should use the correct component for that system.

The solid brass probe can be threaded into a compatible engine block port, radiator, engine cooler, or tapped hose line. American Volt also specifies that this thermostat design can measure the temperature of liquids including water, coolant, and oil, making it useful beyond traditional radiator installations when the system is properly configured.

Durable Brass Temperature Probe

The thread-in temperature probe is constructed from solid brass, providing a durable interface between the cooling system fluid and the temperature-sensitive switching mechanism. Brass is well suited to threaded automotive fluid-system components and allows the sensing portion of the thermostat to respond directly to fluid temperature.

Each Wholesale Sensors replacement is rigorously tested for switching performance, temperature response, electrical operation, and reliability. The fixed temperature calibration provides repeatable automatic control without requiring the driver to constantly monitor a manual fan switch.

Helps Restore Automatic Electric Fan Operation

A failed cooling fan thermostat may prevent an aftermarket electric radiator fan from operating at the intended temperature. Depending on the failure and wiring configuration, the fan may fail to turn on, remain on continuously, activate inconsistently, or operate outside the intended temperature range.

Replacing a confirmed faulty thermostat can help restore automatic fan control when the temperature switch itself is responsible for the problem. However, a fan that does not operate is not automatically evidence of a failed thermostat.

Before replacing the switch, inspect the electric cooling fan motor, relay, fuse or circuit protection, wiring, connectors, grounds, coolant level, thermostat switch circuit, and overall cooling system. Engine overheating can also result from mechanical cooling system problems such as poor coolant circulation, a failed mechanical thermostat, damaged radiator, water pump problem, trapped air, or other faults.

Installation and Wiring Considerations

Installation begins by selecting a suitable 1/8″ NPT temperature sensing location where the brass probe can contact the fluid being monitored. American Volt specifies that compatible switches can thread into an engine block port, radiator, engine cooler, or tapped hose line.

Because this version is a single-pin grounding thermostat switch, it should be wired according to the correct grounding-switch relay configuration. It should not be confused with American Volt’s separate dual-pin powering thermostat switch, which uses a different electrical configuration.

The cooling system should be allowed to cool completely before installation. Relieve cooling system pressure according to the vehicle manufacturer’s service procedure before removing a temperature switch or opening a coolant passage. Confirm proper NPT engagement and avoid excessive tightening that could damage the brass housing or threaded installation point.

This thermostat switch is not an OBD-II engine coolant temperature sensor and should not be expected to directly correct diagnostic trouble codes such as coolant sensor circuit codes. The switch is intended to control a compatible aftermarket electric cooling fan relay circuit. If a check engine light or OBD-II fault is present, diagnose the vehicle’s factory engine management system separately.

Dependable Wholesale Sensors Replacement

Wholesale Sensors specializes in replacement sensing and temperature-control components for automotive, appliance, commercial, and industrial applications. This Replacement for American Volt Electric Radiator Fan Thermostat combines a universal automotive design, solid brass 1/8″ NPT probe, automatic 190°F ON / 175°F OFF switching, rigorous performance testing, and responsive USA-based product support.

Every switch is backed by a strong 12-month warranty, giving automotive technicians, enthusiasts, restoration shops, hot rod builders, race teams, and DIY installers added confidence. For a compatible electric cooling system requiring a single-pin grounding thermostat with a 1/8-inch NPT connection, the Wholesale Sensors replacement provides a dependable solution for restoring automatic radiator fan temperature control.