Laars Heating Systems R0456900 Ignition Module Freon the "/U" suffix simply denotes

the "/U" suffix simply denotes the retail/universal packaging

For technicians troubleshooting intermittent blower failure or module burnouts

this full-size copper tee is specifically built to withstand the rigorous demands of modern refrigerant-bearing lines and pressurized mechanical systems

Check for a weak pilot flame that isn't fully engulfing the top 1/2 inch of the thermocouple

Laars Heating Systems R0456900 Ignition Module Freon the "/U" suffix simply denotesThe 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