Question about 2003 Buick Century

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Heat not hot

Have changed thermostat 4 times since car was new, flushed radiator due to over heating last month, no heat then, but fluids were low in radiator (didnt add quite enough when flushed) fixed it..now...not over heating...fluids are fine...but all of a sudden..NO HEAT...blower works fine,..switches work fine...

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  • 32 Answers

Sounds like ur heater core went out! Better get checked out!

Posted on Nov 01, 2012

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Posted on Jan 02, 2017

  • 41 Answers

SOURCE: had a slow coolant leak Oil temp guage redlined

there is a valve in the hot line to the heater core, it may not be opening. or you might have to disconnect the heater hoses and flush the heater core, stop leak will some times stop up core since tubes are very small

Posted on Dec 18, 2009

Mechanic65
  • 142 Answers

SOURCE: I can,t get heat to work in side the car changed

Do yo know if the heater core is getting Flow. when engine is warmed up. feel heater hoses hoing into and out of heater core. if both are warm then you have a blend door problem. if one is warm and one is cold and coolant is full and no air locks you have a plugges heater core. reverse flushing sometime works. otherwise it would need to be replaced.

Posted on Oct 09, 2009

  • 7 Answers

SOURCE: 1989 Buick Park Ave heating problems.

check to see if there is a resistor on the blower motor. it should be located either beside or underneath the blower motor.. if that is bad it wont let you select different fan speed settings and if it goes completely out the blower will not work at all.

Posted on Feb 12, 2010

honeymokey
  • 3113 Answers

SOURCE: 1990 Buick Park Avenue heat works intermittently

check connector at blower motor, common problem there.

Posted on Apr 09, 2010

alicantecoli
  • 22133 Answers

SOURCE: I have changed the transmission

no check the oil level in gearbox with engine running ,handbrake on and select reverse then check oil level ,i think you will find it then shows the correct level .as for the gearchanges ?' check teh vacumn pipes in case a small thin pipe is perished on the end and it runs to the gearbox to tell the gearbox when to change gear

Posted on Dec 04, 2010

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1 Answer

Why do I have only Intermittent heat with new thermostat?


Sounds like an air pocket in the coolant system. Those can be a pain, some cars have bleed valves to help. If there is an air pocket, it will seem to be full of coolant, but when the air pocket gets to the heater core it gets stuck there and guess what? No heat, because you won't get any heat unless hot coolant is in the heater core. Old fashioned way is to open the system and keep pouring coolant in at operating temp with heat on full until all the air is pushed out. If it has a bleed valve that can be helpful. Have seen this problem on many vehicles.

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Over heating can be caused by many things. The first question I would have is when did the problem begin? If you or someone recently added coolant, perhaps the wrong type was added. The second question would be when was the last time the coolant system was flushed? Preston sells a product with easy to follow instructions to flush out debris in the system. The third is are there any hose leaks? Low levels of fluid would certainly case over heating. The fourth is to change the oil regularly. Old oil and low oil means more heat. Fifth is to be sure nothing is blocking the radiator. A man just lost as big race over a food wrapper stuck on the radiator!! Car was over heating so he slowed down. Does the over heating happen only when you stop at a light? May be a bad fan sensor. Beyond these items you may have a bad thermostat or worst case a bad water pump.

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Ok, g35 coupe 06,52k miles Had over heating problem in april 2010,replaced thermostat, all's well. Now Jan 2011 overheating again, noticed upper & lower radiator hoses collapse, changed thermostat...


Heres a couple of things you can check. Start your car and remove the radiator cap,(before it gets hot mind you) when it reaches norm operating temp, look inside radiator to see if water is circulating. If its not moving, its a bad water pump. Also, youre hoses should never collapse, if they collapse when they get hot maybe you need new hoses? Finally, if those dont work, flush out your radiator. Open the bottom cockpit and use a garden hose and let it flush out the system while the car is running, about 10 mins should do the trick. If the radiator looks clean inside then it doesnt need flushed.

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Only Blows Cold Air


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Mar 07, 2010 | 1998 GMC Safari

1 Answer

My car is running hot do u think i need to change the motor?


buy a radiator flush kit, some prestone flush additive, and even maybe a new thermostat, and a simple haynes manual for your auto. The manual will tell you where and how to change the thermostat, and how to drain the radiator, and how much radiator fluid you will need. The flush kit will instruct you where to put the flush fitting.
Remove the thermo, flush the motor, install new thermo and gasket. Add radiator fluid, done. This should solve your over heating probs. Don't let it over heat! You can cause major probs then.

You could always take it to a shop and pay the $200 to do it for you. My way would cost you less than $50.

please click yes if this helps. thanks

Jan 22, 2010 | 1999 Mercury Cougar

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My 03 G35 is overheating and no heat in the cabin


Hello,
The thermostat was a good choice however you should go to a service station and get a complete cooling system flush.
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Oct 09, 2009 | 2005 Infiniti G35

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HI. MY CADILLAC SEVILLE V8 4.9L '93, STILL OVERHEATING. I REPLACED: NEW RADIATOR, FAN MOTOR, THERMOSTAT, WATER PUMP. SOMETIMES DRIVES GOOD AVERAGE 180 DEGREES, BUT AT NOON INCREASE 240, 255. I DONT KNOW...


Ensure motor tune or other motor mechanical condition is not the cause of overheating, I assume the motor is actually running hot, - ensure the high gauge reading is not just a gauge sender problem. Check cooling fans are operating ok (as necessary when car warms up):- if not check
1) fuse,
2) relay operation,
3) heat sensor switch.

Check the coolant pressure cap is serviceable & of correct rating,
Ensure cooling system is correctly filled, bleed off any airlocks as necessary when re-filling,
Ensure radiator hose on suction side of waterpump is not collapsing at engine revs above idle (due softening),
If the motor has been severely overheated, the head gasket could be blown - look for combustion gas bubbles in the coolant resevoir.

If none of the above fix your problem, replace the thermostat again - it is not unheard of for a new thermostat to be faulty .

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1 Answer

No heat in my 2002 madza mpv.


Two most common causes of your problem are low coolant ( air in the heater core) and a thermo stat stuck open. If you have a temperature gauge and it is reading on the low side. Like 140 Deg or less, you need a new engine thermostat. Feel the top of the radiator tank after the car has been driven. If it is too hot to touch, the thermostat is no the problem. As the system has been flushed and filled I suspect there is enough coolant. Last item on the list is the coolant valve for the heater core. Many cars have a water valve located in line with the supply pipe to the heater core. This valve may be in the engine compartment or under the dash. Check the heater temperature control and follow the cables. One cable most likly goes to this valve. Maybe a cable retaining clop has fallen off

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