the thermostat sets the minimum temperature the engine can run, it doesn't 'top off' higher because it's too cold out - sounds like you have a 160 thermostat, you need a 180 for winter driving

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics