air grid heaters

[Archive]

i started my truck today and the voltage meter went back and forth real fast not like the usual deep cycling the lights and all were blinking real quick does anyone know what this might be all input would be greatly appreciated thanks

 

[Archive]

Mine will do that when the temp is is just at the edge of the intake thermostat setting,somewhere in the mid 50°s. The outside temp can be colder if the engine is still warm from running as the thermostat is seeing warmer temps.