{"product_id":"pk-2650000189","title":"Patterson-Kelley High Limit Temperature Switch - 2650000189","description":"\u003cdiv class=\"product-description-wrapper\" style=\"font-family: sans-serif; line-height: 1.6; color: #333; margin-bottom: 25px;\"\u003e\n  \u003cp style=\"margin-bottom: 16px;\"\u003e\n    The Patterson-Kelley 2650000189 High Limit Temperature Switch is an essential safety control mechanism engineered for heavy-duty commercial and industrial boilers. Functioning as a fail-safe defensive sentinel, this switch continuously monitors internal heat engine and water-jacket temperatures. If the system experiences a primary thermostat failure or runaway thermal climb that exceeds pre-calibrated factory safety parameters, this device instantly breaks the electrical control loop to safely shut down combustion before equipment damage or excessive system pressures occur.\n  \u003c\/p\u003e\n\n  \u003cp style=\"margin-bottom: 12px;\"\u003e\u003cstrong style=\"font-size: 15px; color: #111;\"\u003eAdvanced Safety \u0026amp; Mechanical Safeguards:\u003c\/strong\u003e\u003c\/p\u003e\n  \n  \u003cul style=\"margin-top: 0; margin-bottom: 20px; padding-left: 20px;\"\u003e\n    \u003cli style=\"margin-bottom: 10px;\"\u003e\n      \u003cstrong\u003eStrict Manual Reset Safety Logic:\u003c\/strong\u003e Features a positive mechanical manual reset button. Following a high-temperature safety trip, the switch locks out permanently and cannot be bypassed by cycling the power, forcing a licensed HVAC technician to inspect and resolve the root heating failure.\n    \u003c\/li\u003e\n    \u003cli style=\"margin-bottom: 10px;\"\u003e\n      \u003cstrong\u003ePremium Capillary Thermal Sensing:\u003c\/strong\u003e Utilizing a rugged liquid-filled sensing bulb and a flexible armored capillary tube, it responds rapidly to sharp fluid temperature spikes, ensuring accurate thermal tracking without micro-amp signaling lag.\n    \u003c\/li\u003e\n    \u003cli style=\"margin-bottom: 10px;\"\u003e\n      \u003cstrong\u003eDirect OEM Factory Integration:\u003c\/strong\u003e Specifically designed to align with Patterson-Kelley's strict safety standards, keeping commercial boilers compliant with ASME CSD-1 code requirements.\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp style=\"margin-top: 16px; margin-bottom: 0;\"\u003e\n    \u003cstrong\u003eSystem Application Note:\u003c\/strong\u003e Universally compatible across select high-efficiency condensing and non-condensing commercial boiler architectures, including premium P-K MACH®, SONIC®, and STORM® configurations. \n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Patterson-Kelley","offers":[{"title":"Default Title","offer_id":42910019649630,"sku":"2650000189","price":184.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/Studio_product_shot_of_a_Patterson-Kelley_2650000189_commercial_boiler_high_limit_temperature_switch_displaying_its_gray_protective_control_casing_prominent_red_manual_reset_button_coiled_copper_capillary_line_and_immersion_sensing_probe_on.png?v=1782133617","url":"https:\/\/nationalboilersupply.com\/products\/pk-2650000189","provider":"National Boiler Supply","version":"1.0","type":"link"}