Question about 2003 Pontiac Grand Am

2003 Pontiac Grand Am a/c will only blow cold when engine cooling line is crimped closed ?

1 Answer

deton8 von Splosion

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3,340 Answers

You need to figure out what your heater thermostat valve looks like... locate it & replace it... (or figure out why it is not working).

Blend door/baffle... control solenoid.. whatever!!

At rock auto (below)...

Also check out BBB industries for your wiring diagrams...

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Posted on May 25, 2016

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2003 Dodge Grand Caravan. Heater sometime blows hot but most often very cold when engine is at operating temp. Right now it is blowing cold and the line coming into the heater core is hot but the line out...

There should be a actuator valve on the line that determines if the heater core gets hot water or cold water. When the heater is selected, the actuator opens and lets hot water into the heater core. It sounds like that actuator is corroded and not opening.

Dec 10, 2017 | 2000 Dodge Caravan

1 Answer

Car blows cold air then sometimes hot when excelerating can tell there is loss of power

You could have a bad (broken) vacuum line going to the dashboard area from the engine compartment. These cars use vacuum to open and close the flappers under the instrument panel that control the heat and cooling air routing. The heater controls on the dash usually just open and close valves that route vacuum to the vacuum motors that move the flappers. I had a bad vacuum line under the hood on my '95 mustang last summer. The A/C wouldn't cool the passenger compartment even though the compressor was doing fine and the fluid lines from it were cold. The vacuum line break was on the firewall in the engine compartment. It was real obvious once I figured out what to look for. That could also explain the loss of power. If there is a vacuum leak anywhere in the car, lots of other things that use vacuum don't work right either, including the engine computer etc. Also, the engine could be running lean if a vacuum line is broken, The engine is sucking extra air in through the broken vacuum connection and reduces fuel/air mix robbing you of power. The faster you run the engine, the worse it will be.

Feb 10, 2013 | 1995 Pontiac Grand Am

1 Answer

Have a 1996 Pontiac Grand am. Air conditioner blowing slightly cool, took to Grease Monkey to have checked and freon put in, they said even after serviced the air conditioner still just blows slightly...

If the large ac line(low side) is cold going into the firewall,then the temp door is not working,check it out.

Jun 06, 2010 | 1996 Pontiac Grand Am

1 Answer

2002 Pontiac Grnad AM. Engine temp at 200. Air

Most likely a bad water pump and/or low coolant level

Feb 24, 2010 | 2002 Pontiac Grand Am

2 Answers

My heater on my 2002 pontiac grand prix blows hot then cold air my wife hit a huge pothole on sunday then after that this started doing this please help

check you climate control vacuum hose. it may have come loose or crimped. its located beneath and under battery mount box. also check to see if your coolant resvouir is full as well as your resivour cap is tight.

Jan 26, 2010 | 2002 Pontiac Grand Prix

1 Answer

I have a 1999 pontiac grand prix and the heater only blows cool air on high heat setting, fluid level checks out ok.I have cycled the the cool/heat controler from hot to cold several times and you can hear...

is the temp gauge working and showing the engine is warmed up? also check the heater hoses in the engine compartment ensure both are at the same or close to the same temp. if they are not could have plugged heater core. try flushing. possible blend door could be stuck.

Jan 26, 2010 | 1999 Pontiac Grand Prix

1 Answer

2003 Grand Am. The AC isn't blowing cold air. I added refrigerant. It isn't blowing hot air, just not cold. It sort of seems like it is just blowing in the air off of the engine, but I don't know a lot...

Pre 1996 cars have r-12 refrigerant. If you used the r-134 on your 1993 grand am, get your car to an authorized ac repairshop immediately.

Jul 10, 2009 | 2003 Pontiac Grand Am

2 Answers

Grand prix 3800 blowing only hot air please help

check the temp control switch in the dash

Jun 19, 2009 | 2002 Pontiac Grand Prix

1 Answer

2003 Pontiac Grand Prix - A/C not cool on driver's side

You would need to buy a factory service manual for that blend door diagram. Try eBay for a used manual set.

Aug 22, 2017 | 2003 Pontiac Grand Prix

1 Answer

Pontiac Grand Am 03 is only blowing cold air

The heater core might be clogged. It's located behind the dashboard usually. Just follow the supply and return lines through your fire wall in the engine compartment. Run the engine for awhile then carefully hold the return line, if it's cold you have a clog and the core needs replacement.

Jan 01, 2009 | 2003 Pontiac Grand Am

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2003 Pontiac Grand Am a/c will only blow cold when engine cooling line is crimped closed ?

1 Answer

deton8 von Splosion

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Related Questions:

2003 Dodge Grand Caravan. Heater sometime blows hot but most often very cold when engine is at operating temp. Right now it is blowing cold and the line coming into the heater core is hot but the line out...

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2003 Pontiac Grand Am a/c will only blow cold when engine cooling line is crimped closed ?

1 Answer

deton8 von Splosion

Add Your Answer

Attachments: Added items

Related Questions:

2003 Dodge Grand Caravan. Heater sometime blows hot but most often very cold when engine is at operating temp. Right now it is blowing cold and the line coming into the heater core is hot but the line out...

Car blows cold air then sometimes hot when excelerating can tell there is loss of power

Have a 1996 Pontiac Grand am. Air conditioner blowing slightly cool, took to Grease Monkey to have checked and freon put in, they said even after serviced the air conditioner still just blows slightly...

2002 Pontiac Grnad AM. Engine temp at 200. Air

My heater on my 2002 pontiac grand prix blows hot then cold air my wife hit a huge pothole on sunday then after that this started doing this please help

I have a 1999 pontiac grand prix and the heater only blows cool air on high heat setting, fluid level checks out ok.I have cycled the the cool/heat controler from hot to cold several times and you can hear...

2003 Grand Am. The AC isn't blowing cold air. I added refrigerant. It isn't blowing hot air, just not cold. It sort of seems like it is just blowing in the air off of the engine, but I don't know a lot...

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2003 Pontiac Grand Prix - A/C not cool on driver's side

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