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Look for visible cracks or white "hot spots" on the element
an open circuit typically indicates a burnt winding
Does this switch replace a different WC rating
it must be used as part of the full Y8610 retrofit kit
Trane CNT3670 Limit Switch Els PW 17895 Look for visible cracks orThe Trane CNT3670 is an essential OEM high limit switch designed for American Standard and Trane gas furnaces. This L225F CO limit switch functions as a critical safety component, monitoring the heat exchanger temperature to prevent dangerous overheating. Featuring a Single Pole Single Throw (SPST) configuration, the circuit is normally closed and triggers an open state when internal temperatures reach the 225 degree Fahrenheit trip point. Proper