it should be running about whatever the thermostat is rated at .... get a laser digital thermometer and check the actual temp on various points of the system and see how well it's working and get a comparison to your gauge, never trust gauges, senders, and thermostats

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