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This auto limit switch functions on a specific thermal cycle
When maintaining or repairing Modine unit heaters
the furnace or heater will typically run the indoor blower but will not allow the gas valve or burner to ignite
If your vent pipe or heat exchanger is restricted
For technicians working on 9-inch or 12-inch units
Rheem-Ruud 42-22655-02 Relay This auto limit switch functionsThe Rheem Ruud 42 22655 02 Relay is a professional grade Delay On Break (DOB) timer engineered for high cycle HVAC performance. This specific OEM HVAC replacement part is critical for preventing compressor short cycling, which protects the system from premature mechanical wear and electrical stress during rapid thermostat fluctuations or brownouts. Formulated as a 5 minute time delay relay, it ensures the refrigerant pressures in the compressor have