Raise the lift arms and install an approved lift arm support device. (See Installing Lift Arm Support Device on Page 10-20-1.)
Turn the fan switch (Item 1) [Figure 80-30-26] to the High Speed position, with the loader ignition switch OFF.
Raise the operator cab. (See Raising The Operator Cab on Page 10-30-1.)
Connect the remote start tool to the loader. (See REMOTE START on Page 10-60-1.)
Start the loader and run at high idle, for ten minutes.
Check the heater hose (Item 1) [Figure 80-30-27] for temperature.
If the hose is hot, the heater valve is leaking by, and needs to be replaced.