12-10-2014, 06:08 AM
Mark,
The sun is coming up and more learned minds are available to help, Roger Berke.
Looks like that if the C fuse, the fuse for the all pumps is good which tested good last night, then the pumps have lost their prime. So now that the tank is completely full, rent or purchase a radiator pressure tester, connect to the radiator filler neck, pump up to 13 to 15 pounds and turn the three pumps on.
The tank pressure will force the coolant up into the pumps and once primed they will pump the coolant around the heating loops and will stay primed.
The low coolant may have contributed to the hot water issue. If pumps prime up but the hot water issue continues, then replace the mixing valve for the hot water issue.
The sun is coming up and more learned minds are available to help, Roger Berke.
Looks like that if the C fuse, the fuse for the all pumps is good which tested good last night, then the pumps have lost their prime. So now that the tank is completely full, rent or purchase a radiator pressure tester, connect to the radiator filler neck, pump up to 13 to 15 pounds and turn the three pumps on.
The tank pressure will force the coolant up into the pumps and once primed they will pump the coolant around the heating loops and will stay primed.
The low coolant may have contributed to the hot water issue. If pumps prime up but the hot water issue continues, then replace the mixing valve for the hot water issue.
Rudy Legett
2003 Foretravel U320 4010
ISM11 450 hp Allison 4000R
Factory Authorized Aqua Hot Repair Center
Southeast Texas Area