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8. Water Solenoid Valve
If the thermostat is on and the fans
are on, but they are blowing cold
air, check the voltage at the red and
black wire on the solenoid valve.
If you have 12 volts, check to be
sure the valve is engaging when the
system is turned on. If it is not engag-
ing, you will need to replace it. If it
is engaging, check inside the Tim-
berline tank to be sure there is the
correct amount of uid movement in
the system.
If there is no uid movement inside
the tank, refer to section 5.9 in order
to check the circulation pump.
To replace the solenoid valve, pinch
off the uid lines on each side of the
unit, remove the spring clamps, and
pull the unit out. Install new unit.
After the reinstallation, purge the unit
(refer to section 13.)
If the coach is not heating, check the
functionality of the heating fans. The
fans should be blowing hot air if the
Timberline system is on and the ther-
mostat is not satised. If there is no air
movement out of the fans, check the
voltage at the red and black wire on
the back of the fan. If there is voltage
but the fans are not coming on, the unit
will need to be replaced. If there is no
voltage, inspect the wiring for damage
or cut wires.
To replace the heating fans, pinch
off the uid lines on the back of the
fan unit, remove spring clamps, and
remove the unit. Install new fans.After
the reinstallation, purge the unit (refer
to section 13.)
9. Heating Fans
Fig. 15. Water Solenoid Valve Fig. 16. Heating Fans