10-06-2019, 05:30 PM
The other possibility to Adrain's situation is a failed closed control thermostat that allows the coolnt to over heat each time the high limit thermostat is reset. Control thermostat much less expensive.
But one must measure the coolant temp when the burner is operating to see if it gets above 200 degrees with out the control thermostat cycling it off off. The control thermostat normally cycles off at about 175 but the hot surfaces can warm the coolant above that.
But one must measure the coolant temp when the burner is operating to see if it gets above 200 degrees with out the control thermostat cycling it off off. The control thermostat normally cycles off at about 175 but the hot surfaces can warm the coolant above that.
Rudy Legett
2003 Foretravel U320 4010
ISM11 450 hp Allison 4000R
Factory Authorized Aqua Hot Repair Center
Southeast Texas Area