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For technicians troubleshooting intermittent blower failure or module burnouts
The Marley Engineered Products 4520-2059-000 is an OEM 160-230F AUTO Limit Switch designed for high-accuracy temperature monitoring in HVAC heating systems
Check for a weak pilot flame that isn't fully engulfing the top 1/2 inch of the thermocouple
the "/U" suffix simply denotes the retail/universal packaging
Laars Heating Systems R0456900 Ignition Module Freon For technicians troubleshooting intermittent blowerThe Laars Heating Systems R0456900 Ignition Module is a critical direct fit replacement for ensuring precise sequence control in high efficiency heating applications. As a hot surface ignition (HSI) control, this module is engineered for compatibility with Jandy JXi and LXi Low NOx heaters, as well as several Laars and Zodiac heating systems including the Legacy LRZM series. It functions by monitoring the flame sensor, limit switches, and pressure
