Standard practice dictates using OEM Modine parts like the 5H0735910004

Replacing a failing valve helps mitigate liquid line restrictions

25 VDC signal

or the burners failing to ignite despite a call for heat

Carrier 08-1991-00 Switch 321042-401 Standard practice dictates using OEMSecure consistent equipment performance with the Carrier 08 1991 00 Switch, a precise OEM replacement part engineered for critical temperature monitoring in HVACR systems. This auto reset limit switch is built with a cut out temperature of 140F and a cut in reset point at 90F (L140 50F series), ensuring the electrical circuit opens instantly during overheating events to protect the heat exchanger and internal components. As a veteran grade HVAC safety