Done a lot of research and looking for advice regarding my heater.
‘93 FZJ80 - My front and rear heaters blow hot for about 10 seconds then become lukewarm. A/C blows cold and all blowers, modes, and vents work. Heater control valve on firewall is new and opens / closes properly. Back flushed heater core (I have not noticed the passenger floorboard get wet). New thermostat. Pulled most the dash to replace air mix servo motor, no improvement. The cable attached to air mix servo motor moves when I change the temp. Inlet and Outlet heater hoses are hot after running heater, so I would like to assume the heater core is not clogged. I’ve also burped the cooling system and ensured coolant levels are good.
Looking for any advice or direction for where to look next. Any tips are appreciated!
‘93 FZJ80 - My front and rear heaters blow hot for about 10 seconds then become lukewarm. A/C blows cold and all blowers, modes, and vents work. Heater control valve on firewall is new and opens / closes properly. Back flushed heater core (I have not noticed the passenger floorboard get wet). New thermostat. Pulled most the dash to replace air mix servo motor, no improvement. The cable attached to air mix servo motor moves when I change the temp. Inlet and Outlet heater hoses are hot after running heater, so I would like to assume the heater core is not clogged. I’ve also burped the cooling system and ensured coolant levels are good.
Looking for any advice or direction for where to look next. Any tips are appreciated!