Bridge the Thermostat Connection on a Solar Attic Fan SR1800

The SR1800 is designed to be the easiest solar attic fan to maintain. The first step in troubleshoot problems with a solar attic fan that doesn't work is always to  bridge the thermostat to verify if it is working or not. Why do I need to bridge the thermostat? Normally, this is not necessary. However, this procedure is an excellent