LGN Owner's Manual
Troubleshooting
Page 43
LGN-Owners-Manual-071520
SYMPTOM
PROBABLE CAUSE
REMEDY/COMMENT
Little or No Hot Air
1. Insufficient engine load.
2. Low electronic coolant
control valve faulty.
3. Low coolant or air lock.
4. Cooling system blocked.
1. Check if main engine
block heater is plugged
in.
2. Check water valve
operation.
3. Bleed system of air and
fill.
4. Flush cooling system.
5. Faulty engine
thermostat.
Little or No Cold Air
1. Cabin Controller not set
to A/C mode.
2. No Output power to Pin
#2 on connector J1.
3. A/C system leak.
4. Condenser/radiator dirty.
5. Compressor not working.
6. Evaporator core frozen.
7. Electric fan not
operating.
8. Electronic coolant control
valve faulty.
1. Set Controller
temperature.
2. Check for 12V at A/C
clutch control output.
3. Check system pressures.
4. Clean
radiator/condenser.
5. Check the compressor
and fuse.
6. Replace thermostatic
switch.
7. Check fan relay and
fuse.
8. Replace electronic
coolant control valve.
Troubleshooting
– Serpentine Drive Belt
SYMPTOM
PROBABLE CAUSE
REMEDY/COMMENT
Belt has Premature
Wear
1. Use of incorrect belt.
2. Damage to pulleys.
3. Misalignment of pulleys.
1. Use correct belt.
2. Replace damaged
pulleys.
3. Realign pulleys.
Belt is Loose and/or
comes off repeatedly
during Operation
1. Use of incorrect belt.
2. Damage to pulleys.
3. Maladjusted Belt.
1. Use correct belt.
2. Replace damaged
pulleys.
3. Replace belt.
For additional diagnostic and troubleshooting information, please visit
www.rigmasterpower.com
and click on the "Customer Support" heading,
"Support Materials" menu option.
