1994 BUICK CENTURY heater

Engine Coolant Heater (Engine Block Heater) (Canada Only)
In very cold weather, 0°F (-18°C) or colder, the engine
coolant heater can help. You’ll get easier starting and
better fuel economy during engine warm-up. Usually,
the coolant heater should be plugged
in a minimum of
four hours prior to starting your vehicle.
To use the coolant heater:
1. Turn off the engine.
2. Open the hood and unwrap the electrical cord.
3. Plug it into a normal, grounded 110-volt outlet.
I NOTICE:
After you’ve used the coolant heater, be sure to
store the cord
as it was before to keep it away
from moving engine parts. If you don’t, it could
be damaged.
How long should you keep the coolant heater plugged
in? The answer depends on the weather, the kind
of oil
you have, and some other things. Instead of trying to list
everything here, we ask that you contact a Buick dealer
in the area where you’ll be parking your vehicle. The
dealer can give you the best advice for that particular
area.
78
ProCarManuals.com

Part 3 Comfort Controls and Audio Systems
In this part you’ll find out how to operate the comfort control systems and audio systems offered with your Buick .
Be sure to read about the particular system supplied with your vehicle .
Part 3 includes:
Comfort Control System .......................................................... i22
Airconditioner ............................................................... 122
Ventilation
................................................................... 123
Heater and Defroster
........................................................... 123
RearWindowDefogger
........................................................ 123
Audiosystems
.................................................................... 125
Radio Controls
....................................................... 126. 128. 130
TapePlayerControls ........................................................... 130
CDPlayerControls
............................................................ 132
Care of Cassette Tape Player and Tapes
............................................ 136
CareofCompactDiscs
......................................................... 136
Power Antenna Mast Care
...................................................... 137
ProCarManuals.com

Your Buick Comfort Control System
The air conditioner and heater work best if you keep
your windows closed while using them. Your vehicle
also has the flow-through ventilation system described
later in this section.
Lever Controls: The upper lever changes the functions
of your system. The lower lever changes the temperature
of the air coming through the system.
The lever next to the fan symbol selects the force of air
you want.
To turn the fan off, move the upper lever to the OFF
Air Conditioning
The upper lever has three air conditioner settings. On
very hot days, open the windows long enough to let hot
inside air escape. This reduces the amount of work your
air conditioner's compressor will have to do, which
should help fuel economy.
MAX: Provides maximum cooling with the least
amount of work. This setting recirculates much
of the
air inside your vehicle
so it maximizes your air
conditioner's performance and fuel economy.
NORM (Normal): Use for normal cooling on hot days.
This setting cools outside air and directs it through the
instrument panel outlets.
BI-LEV (Bi-Level): Use this on cool, but sunny days.
This setting brings in the outside air, and directs it in
two ways. The cool air is directed to the upper portion
of your body through the instrument panel outlets, and
warmed air is directed through the heater ducts and
defroster vents. At times this temperature difference
may be more apparent than others.
The air conditioner compressor operates in all Air
Conditioning positions, and in Defrost when the outside
temperature is above about 40°F (4.5"C).
position.
__
ProCarManuals.com

Ventilation
For mild outside temperatures, when little heating or
cooling is needed, slide the upper lever
to VENT. Air
flow is through the instrument panel outlets. Rotate the
control next to the outlets to turn on, adjust or
turn off
the air flow. Adjust the lower lever
on the control panel
to the temperature desired.
Heating
When outside temperatures are cold, sliding the upper
lever
to HEATER and the lower lever to HOT will send
heated air through the heater ducts, and some through
the defroster vents. VENT and HEATER are labeled
ECONOMY positions because the air conditioner
compressor doesn't run in these two settings. This
reduces engine load, resulting in improved fuel
economy. If either setting fails to keep you comfortable,
or causes your windows
to fog up, slide the upper lever
to one of the Air Conditioning positions, or to DEF
(Defrost).
Defrosting
The DEF setting directs most of the air through the
defroster vents, and some through the heater ducts.
Defog
To quickly defog the windshield, set the upper lever to
DEF and move the fan switch to HI . Slide the lower
lever to
HOT.
In damp, cool weather (temperatures about 45 "-65"F,
7"- 1 8"C), you can use BI-LEV to defog the side
windows. Set the upper lever to BI-LEV and the fan
switch to
HI. Aim the side vents toward the side
windows. For increased air flow to the side vents, close
the center vents.
Rear Window Defogger (Option)
The rear window defogger
uses a warming grid to
remove fog from the rear
window. In winter, it can
also keep ice from forming
on the rear window.
132
ProCarManuals.com

Press the ON portion of the switch. The indicator light
will glow. The rear window defogger will turn off
automatically after about
10 minutes of use. You can
also turn it off by turning
off the ignition or pressing the
OFF portion of the switch.
I NOTICE:
Don’t use a razor blade or somerning else sharp
on the inside
of the rear window. If you do, you
could cut or damage the warming grid, and the repairs wouldn’t be covered by your warranty.
Flow-Through Ventilation System
Your Buick’s flow-through ventilation system supplies
outside air into the vehicle when it
is moving. Outside
air will also enter the vehicle when the heater or the air
conditioning fan is running.
Ventilation Tips
Keep the hood and front air inlet free of ice, snow, or
any other obstruction (such as leaves). The heater
and defroster will work far better, reducing the
chance of fogging the inside of your windows.
When you enter a vehicle in cold weather, turn the
blower fan
to HI for a few moments before driving
off. This helps clear the intake ducts of snow and
moisture, and reduces
the chance of fogging the
inside of your windows.
Keep the air path under the front seats clear of
objects. This helps air to circulate throughout your
vehicle.
124
ProCarManuals.com

bags, rags, floor mats -- anything you can wrap around
yourself or tuck under your clothing
to keep warm.
You
can run the engine to keep warm, but be careful.
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 charged.
You will need a well-charged battery to
restart the vehicle, and possibly for signaling later
on
with your headlights. Let the heater run for awhile.
164
ProCarManuals.com

If you get the overheat warning with no sign of steam,
try this for a minute or
so:
1. Turn off your air conditioner.
2. Turn on your heater to full hot at the highest fan
speed and open the window as necessary.
3. Try to keep your engine under load (in a drive gear
where the engine runs slower).
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, you can idle the engine
for two or three minutes while you're parked, to 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. When you
decide it's safe to
lift the hood, here's what
you'll see:
(A) Coolant recovery tank
(B) Radiator pressure cap
(C) Electric engine fan
You may decide not to
lift the hood but to get service
help right away.
185
ProCarManuals.com

I
I.
A
If the coolant inside the coolant recovery tank is boiling,
don’t do anything else until it cools down.
The coolant level should be at or above the
“FULL
HOT” 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.
186
ProCarManuals.com