200F Temperature Switch

The AutoMeter 200F Temperature Switch (model 3246) is a precision engine management component designed for serious enthusiasts and mechanics who demand accurate coolant temperature monitoring and control. This switching device serves as the critical link between your engine's cooling system and auxiliary functions—whether triggering electric fans, activating warning lights, or managing fuel enrichment circuits. Built to OEM specifications, the 200F temperature switch activates at precisely 200 degrees Fahrenheit, making it essential for vehicles with high-performance modifications, custom cooling setups, or aftermarket engine management systems that require reliable thermal feedback.

AutoMeter's temperature switch employs a bimetallic sensing element housed in a compact, threaded body designed for direct installation into engine blocks or coolant passages. The switch operates as a simple on/off device at the 200-degree setpoint, delivering consistent electrical continuity when coolant temperature reaches the threshold. This design eliminates the variability of analog senders and provides the decisive switching action required by modern electronic control modules, cooling fans, and relay circuits. The robust construction ensures durability under thermal cycling and vibration, critical factors in turbocharged builds, LS swaps, and other high-demand engine configurations where temperature stability directly impacts reliability and performance.

This temperature switch is ideal for builders integrating custom cooling systems, electric fan conversions, or fuel injection tuning packages that rely on precise thermal management. Mechanics installing the AutoMeter 200F switch should verify coolant passage thread compatibility (typically 1/2-inch NPT or 3/8-inch NPT depending on application) and confirm voltage compatibility with the control circuit or relay being triggered. The compact 5.65-inch length and lightweight 0.12-pound design make installation straightforward in tight engine bays, and the sealed switch body resists moisture and corrosion common in aggressive underhood environments. Perfect for street performance, track prep, or restoration projects where factory temperature switches lack precision or adjustability.