1997 Pontiac Grand Am Support Question
1997 Pontiac Grand Am Support Question
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Question posted by jdague on December 27th, 2012
Blows Cold Air From Heater
We have put a new heater core, radiator, thermostat and redone the head gaskets. All lines are open but still doesn't blow hot air. What can we try next/
Requests for more information
Request from Coldspot on December 27th, 2012 4:49 PM
Have you bled the air out of the cooling system? Varies a bit from vehicle to vehicle but you will need to a few heat cycles at a minimum. Check your manual. Are your controls working? Do you know if your water control valve is opening?
Have you bled the air out of the cooling system? Varies a bit from vehicle to vehicle but you will need to a few heat cycles at a minimum. Check your manual. Are your controls working? Do you know if your water control valve is opening?
Current Answers
Answer #1: Posted by roadrunnertim on December 27th, 2012 4:53 PM
roadrunnertim
Member since:
May 9th, 2012 Points: 1,071,190
Member since:
May 9th, 2012 Points: 1,071,190
Are the hoses going into and out of the heater core hot (not just warm) when the vehicle is warmed up? If they are both hot, then it has to be one of two things.
My first guess is that the heater blower motor is defective. It may be working, but not at 100% of it's original capacity. Make sure that the blower motor is powerful enough to blow air over the heater core so that heat reaches the passenger compartment.
My other guess is that the vent leading out from the heater box is blocked or disconnected. You may have disconnected it when you did the heater core. You may also have a mouse nest in the vent, which is blocking the air flow.
If one (or both) of the hoses leading to the heater core are warm, but not hot, then it's a totally different problem. It could be that you put the thermostat in upside down or you have a defective thermostat. Even if it is brand new out of the box, thermostat's can sometimes be inoperative.
If none of the above are the problem, my last idea would be a bad water pump. The pump needs to circulate the coolant at a steady rate to insure that you have heat inside the vehicle. If the impeller is damaged, it won't circulate the coolant. If that's the case, your vehicle should be running hot.
Related Manual Pages
Owner's Manual - Page 56
... 2-13 2-13 2- 14 2- 16 2-19 2-2 1 2-25 2-28 2-29 2-3 1 Keys Door Locks Keyless Entry System (If Equipped) Trunk Theft Passlock TM New Vehicle"Break-In" Ignition Positions Starting Your Engine Engine Coolant Heater (If Equipped) Automatic Transaxle Operation Manual Transaxle Operation Parking Brake Shifting Into PARK (P) (Automatic Transaxle Models Only) Shifting Out of...
Owner's Manual - Page 74
O
2-19 Usually, the coolant heater should be plugged in a minimum of four hours priorto starting and better fuel economy during engine warm-up. You'll get easier starting your vehicle.
Engine Coolant Heater(If Equipped)
3100 Engine
2.4L Engine
In very cold weather, O F (- 18 C) or colder, the engine 0 coolant heater can help.
Owner's Manual - Page 127
... the temperature of air you can control the ventilation and heating in your system. Airflow is directed through the heater ducts and defroster vents. slightly warmer air is through ventilation system... little heating or cooling is directed to the upper portion of your vehicle. Cooler air is needed. Climate Control System
Mode Knob The right control knob changes the functions of...
Owner's Manual - Page 128
...
9 BLEND: This setting divides airflow equally
between the heater ducts and the windshield defroster vents. DEFROST This setting directs air through the windshield defroster vents.
To select the force of air you have the optional engine coolant heater (engine block heater) anduse it during cold weather, 0°F (- 18°C) or lower, your heating system will more...
Owner's Manual - Page 129
...Heater" in the Index.
9 BI-LEVEL: Use on hot days.
MAX: Use for normal cooling on cool, but directs it through the instrument panel outlets.
'!AHEATER: This setting brings heated air through
the heater... but slightly warmer air is through the heater ducts and defroster vents.
If you have the optional engine coolant heater (engine block heater) and use it during cold weather, 0°F...
Owner's Manual - Page 130
.... Heating
Turning the right control knob to let hot, inside air escape. If the setting is it . Air Conditioning
On very hot days, open the windows long enough to HEATER and the center control knob clockwise sends some heated air through the defroster vents. VENT and HEATER areeconomical positions because the air conditioner compressor doesn't run in your vehicle...
Owner's Manual - Page 132
... other obstruction (such as leaves). Ventilation System
Use when outside air into the vehicle when it is moving. Ventilation Tips
0
Keep the hood and front air inlet free of your windows. The heater and defroster will also enter thevehicle when the heater or the air conditioning fan isrunning. Set the center knob to VENT.
Turn...
Owner's Manual - Page 208
...if warning, turn ofStheengine and get everyone out of steam, try this for two or three minutes while you no steam, the problem may not...air conditioner, turnit off.
2. Turn on a hot day. AUTOMATIC OVERDRIVE (@)or DRIVE (D) for long periods in a traffic jam, shift to the warning stops. If the warning continues,pull over, stop, and park your heater to full hot at the highest fan speed and open...
Owner's Manual - Page 210
... electric fan under the hood can you may have a leak in the radiator hoses, heater hoses, radiator, water pump or somewhere else in the cooling system.
5-17 If it cools down. The coolant level should be at or above FULL COLD.
If the coolant inside the coolant surge tank is not running and injure...
Owner's Manual - Page 211
Engine damage from a cooling hot system can blow out and burn badly. I NOTICE:
.
Wait for more information.)
Heater and radiator hoses, and otherengine If parts, can... the Coolant Surge Tank
If you haven't founda problem yet, but the coolant level isn't at or above FULL COLD, add a 50/50 mixture of clean water (preferably distilled) and DEX-COOL@ coolant at high speed. Don...
Owner's Manual - Page 212
... CAUTION:
Adding only plain water to your engine could mix, get too hot you others could catch fire and or you wouldn't get but the overheat..., Use a 50/50 mix of clean water and DEX-COOL@coolant.
~
r
NOTICE:
In cold weather, water can freeze and crack the So engine, radiator, heater core and other or liquid likealcohol, can be dangerous. Plain water, some other parts, recommended use the...
Owner's Manual - Page 214
..., up to coolant surge tank the until you can feel the upper radiator hose getting hot. the level is lower, add If more of the proper mix to FULL COLD, or just above the small cylinder at the base of the opening .
4.
With the coolant surge tank pressure cap off, start the engine and...
Owner's Manual - Page 252
...:
When adding coolant, is added to the system, premature engine, heater core or radiator corrosionmay result.In addition, the engine coolantwill require change sooner at 30...to add anything else. Your engine could be dangerous.
Your vehicle's coolant warning mix. What to your new vehicle warranty. system is not covered by your cooling system or can before the proper boil coolant mix...
Owner's Manual - Page 253
... be harmful.
The coolant surge tank is located on the passenger's side of the engine compartment.
6-26
These can freeze mix and crack the engine, radiator, heater core and other parts. NOTICE:
If you use the proper coolant, you don't have to add extra inhibitors or additives which claim to add coolant more...
Owner's Manual - Page 254
...cap even a little when the engine and radiator are hot,
Adding Coolant
If you spill coolanton hot engine parts. You can steam and allow scalding liquids to blow out and burn you 're low onengine ... i n g the surge tank pressure cap the when engine and radiator are hot can be at the surge tank, but only whenthe engine is cold, the coolant level should be burned if you need more coolant, add...
Owner's Manual - Page 288
... Window Defogger, Remote Keyless Entry Fog Lamps Instrument Cluster, Powertrain Computer, Park-Lock Solenoid. Electronic PRNDL Door Locks Air Bag-Power Horn, Service Tool Power Instrument Cluster Stoplamps, Hazard Lamps, Anti-Lock Brakes Powertrain Control Module Door Locks...Lamp, Radio, Power Mirrors), Anti-Lock Brakes, Variable Effort Steering Power Seat Radio Heater/Air Conditioning Blower.
Owner's Manual - Page 290
Fuse IGN MOD HVAC BLO MOT
PCM BATT CLG FAN HDLP STOP LPS PWR ACC RR DEFG ABS IGN SW
Usage IgnitionBULB System LAMPS Heater/Air Conditioner-High Blower, Generator-Voltage Sense Powertrain Computer Engine Cooling Fan Lighting Circuits Power Accessories, Stop Lamp Circuits, Rear Window Defogger Anti-Lock Brakes, Variable ...
Owner's Manual - Page 294
...49 At Least Once a Year Part C: Periodic Maintenance Inspections Steering, Suspension and Front Drive Axle Boot and Seal Inspection Exhaust System Inspection Radiator and Heater Hose Inspection Throttle Linkage Inspection Brake System Inspection Caliper/Knuckle Maintenance Inspection Part D: Recommended Fluids and Lubricants Part E: Maintenance Record 7
7-2 7-2 7-3 7-4 7-4 7-4 7-7 7-29 7-4 1 7-41...
Owner's Manual - Page 338
... other conditions which should be found in thefloor pan or could let exhaust fumes into the vehicle.
Radiator and Heater Hose Inspection
Inspect the hoses and have high effort or excessive wear. Inspect the power steering lines and hosesfor proper hook-up in a GM service manual. Replace parts as openseams, holes, loose connections...
Owner's Manual - Page 361
...Wheels ...6-55 Windshield and Wiper Blades ...6-53 Climate Control System ...3-2 Climate Control System with Air Conditioning ...3-3 Clock, Setting the ...3-8 Clutch Fluid, Hydraulic ...6-23 Clutch, Hydraulic ...6-23...1 Convex Outside Mirror ...2-48 Coolant ...6-24 Adding ...5-18, 6-27 Checking ...6-26 Heater, Engine ...2-19 SurgeTank ...5-16 Surge Tank Pressure Cap ...6-28 Cooling System ...5-16 ...
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