heater CHEVROLET SUBURBAN 1994 User Guide

Fan Control Button
This button is in the upper right corner of your system control panel. The
fan has four settings
- low, medium low, medium high and high. Press the
top
of the button (+) to increase the air flow. Press the bottom of the button
(-) to decrease the air flow. The setting you select is shown on your display
as
LOW, MED LOW, MED HI or HI.
OFF Button
Press this button to turn the air conditioningheating system off. Pressing
OFF will erase the present mode of operation from the system’s \
memory,
Outside air will still come out of the heater outlet whenever the vehicle
is
moving forward.
If the OFF button was pressed, you must press A/C, MAX, or one of the
BLEND buttons for the system to come back on.
Rear Air Conditioning and Heating Systems (Wagon
Models)
If your vehicle has either or both of these systems, you can increase and
decrease the air flow at the rear vents. Depending
on the system you have
and the setting selected, you can send cooled
or heated air to the rear of the
vehicle.
Rear Air Conditioning (Without Rear Heater)
If your vehicle has rear air conditioning (without rear heater), the controls \
are located above the front and second seats.
The front and rear overhead
controls let
you increase and decrease the air flow at the rear vents.
Front Control Rear Control
e
F
t
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To operate the rear air conditioning system, the front air conditioning
system must be
on. With the front air conditioning system off, the rear
system controls can be used to circulate air in the rear of the vehicle.
To operate the rear system using the front control, just turn the knob to the
blower position you want.
To use the rear control, first turn the front control knob to REAR CNTL.
Then, the rear control can be used to increase and decrease the air flow.
Rear Heater (Without Rear Air Conditioning)
If you have a rear
heater (without rear
air conditioning), the
control switch
is
located on the
instrument panel.
To increase and decrease the flow of heated air to the rear floor vents, move
the switch with the fan symbol
on it to the blower speed you want.
Move the switch all the way to the left position to turn the rear blower off,
and
each position to the right increases the flow of heated air.
Move
the switch all the way to the right position to turn the blower on high,
providing maximum flow of heated air.
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Rear Air Conditioning and Rear Heater
If your vehicle has a rear air conditioning and rear heater system
combination, controls are provided to regulate the temperature, location and
speed
of the air flow.
Front Control Rear Control
1
To adjust the air temperature, turn the temperature knob on the right side of
the control panel. For warmer air, turn the knob to the right (red) side, and
for cooler air, turn the knob to the left (blue) side.
To regulate the air flow location, adjust the center knob on the control panel.
Turn the knob toward the left for tloor vent air flow or toward the right for
headliner
vent air flow. Generally, the upper vents are used for air '
conditioning and the floor vents for heating: However, the control knob may
be set
to allow any desired blend of air flow.
To adjust the air flow speed, turn the fan control knob on the left side of the
control panel to the desired blower setting.
To activate the rear control, move the fan knob on the front control to
REAR CNTL. This will allow second seat passengers to adjust the controls
as they desire.
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Rear Window Defogger
You can tell if your vehicle has this option by looking at the rear window. If
you see lines running across the glass, you have it. These are the wire-like
elements which heat your window.
1 NOTICE:
Scraping the inside of your rear window could cut and damage
the defogger. Your warranty would
not cover this damage. And,
don't
put decals there, you might have to scrape them off.
For best results, clear the window of as much snow or ice as possible first.
To turn on the rear
window defogger, find
the switch marked
REAR DEFOG on
your instrument panel,
just below the heater
system.
Press the right side of
the switch, with the defog symbol on it, until the light
in the switch comes on, then release it.
The rear window defogger will only work if the ignition switch is turned to
RUN.
You can turn the defogger off at any time by pressing the left, lighted side of
the switch. The defogger will
shut itself off after several minutes, so that the
glass does not get too hot. If the defogger shuts off, and the window still
isn't clear, turn the defogger
on again.
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Run your engine only as long as you must. This saves fuel. When you run
the engine, make it
go a little faster than just idle. That is, push the
accelerator slightly. This uses less fuel for the heat that you get and it keeps
the battery (or batteries) charged.
You will need a well-charged battery (or
batteries) to restart the vehicle, and possibly for signaling later on with your
headlights. Let the heater run for awhile.
If you have a diesel engine, you may have to run it at a higher speed to get
enough heat. Then, shut the engine
off and close the window almost all the
way to preserve the heat. Start the engine again and repeat this only when
you feel really uncomfortable from the cold. But do it as little as possible.
Preserve the fuel as long as you can.
To help keep warm, you can get out of
the vehicle
and do some fairly vigorous exercises every half hour or so until
help comes.
Power Winches
If you wish to use a power winch on your vehicle, only use it when your
vehicle is stationary or anchored.
NOTICE:
When operating a power winch on your vehicle, always leave the
transmission in “N” (Neutral). Leaving a automatic
transmission in “P”(Park) while using a power winch may \
damage the transmission. Also, leaving a automatic or manual
transmission in gear while using an power winch may damage
the transmission.
Use the regular brakes, set the parking brake, or block the wheels to keep
your vehicle from rolling.
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If No Steam Is Coming From Your Engine
If you get the overheat warning but see or hear no steam, the problem may
not be too serious. Sometimes the engine can get a little too hot when you:
Climb a long hill on a hot day.
Stop after high speed driving.
Idle for long periods in traffic.
Tow a trailer.
If you get the overheat warning with no sign of steam, try this for a minute
or
so:
1. If you have an air conditioner, turn it off.
2. Turn on your heater to full hot at the highest fan speed and open the
3. If you’re in a traffic jam, shift to “N’ (Neutral).
window
as necessary.
If you
no longer have the overheat warning, you can drive. Just to be safe,
drive slower for about ten minutes. If the warning doesn’t come back on,
you can drive normally.
If the warning continues, pull over, stop, and park your vehicle right away.
If there’s still
no sign of steam, push the accelerator until the engine speed is
about twice as fast as normal idle speed. Bring the engine speed back to
normal idle speed after two or three minutes. Now see
if the warning stops.
But then, if
you still have the warning, TURN OFF THE ENGINE AND
GET EVERYONE OUT OF THE VEHICLE until it cools down.
You may decide not to lift the hood but to get service help right away.
Cooling System -Gas Engines
When you decide it’s
safe to lift the hood,
here’s what you’ll see:
A. Coolant recovery
“I tank
B. Engine fan(s)
C. Radiator pressure
cap
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If the coolant inside the coolant recovery tank is boiling, don’t do anything
else until it cools down.
P
The coolant level
should be at or above
the
COLD mark. If it
isn’t,
you may have a
leak in the radiator
hoses, heater hoses,
radiator, water
pump
or somewhere else in
the cooling system.
NOTICE:
Engine damage from running your engine without coolant isn’t \
covered
by your warranty.
If there seems to be no leak, start the engine again. See if the fan speed
increases
when idle speed is doubled by pushing the accelerator pedal down.
If it doesn’t, your vehicle needs service. Turn off the engine.
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How to Add Coolant to the Coolant Recovery Tank
If you haven’t found a problem yet, but the coolant level isn’t at or above
the
COLD mark, add a 50/50 mixture of clean water (preferably distilled)
and a proper antifreeze at the coolant recovery tank. (See “Engine Coolant”
in the Index for more information about the proper coolant mix.)
NOTICE:
In cold weather, water can freeze and crack the engine, radiator, \
heater core and other parts.
Use the recommended coolant.
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If the coolant inside the coolant surge tank is boiling, don't do anything else
until it cools down.
The coolant level
should be at
or above
the
COLD mark. If it
isn't, you may have
a
leak in the radiator
hoses, heater hoses,
radiator, water
pump
or somewhere else in
the cooling system.
NOTICE:
Engine damage from running your engine without coolant isn't
covered by your warranty.
If there seems to be no leak, start the engifie again. See if the fan speed
increases when idle speed
is doubled by pushing the accelerator pedal down
If
it doesn't, your vehicle needs service. Turn off the engine.
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NOTICE:
In cold weather, water can freeze and crack the engine, radiat\
or,
heater core and other parts.
So use the recommended coolant.
1. You can remove the coolant surge tank pressure cap when the cooling
system, including the coolant surge tank pressure cap and upper
radiator
hose, is no longer hot.
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