Question about 2003 Toyota Camry

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No heat The coolant is full, and heat hose are fine, just no heat

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Have you checked the heater core ??
It may be stopped up.

Posted on Oct 29, 2012

  • njbutler16
    njbutler16 Oct 29, 2012

    I haven't, I don't know how to do that, also I think it might be a vent door issue...

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I don't get any heat when I turn my heater on.


Is the coolant full ? What year an make an model vehicle ? Are the heater hose's going inside through the fire wall hot to the touch ? What condition is the coolant , does it look like a muddy color. GM dexcool coolant turns a muddy rust color , in fact that's what it is ,an It clogs radiators , heater cores , coolant passages in the engine etc.... An some vehicles have a control valve ,or some call it a hot water valve under the hood in the engine compartment . These valves are in the heater hose and are vacuum controlled . These valves do go bad an the hot water isn't allowed to go through the heater core .

Nov 13, 2015 | AC Cars & Trucks

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No heat or very little heat in a 2001 blazer and iv tried everything ...it will blow some heat then go cold


Bad coolant flow. check for low coolant, also a thermostat could be restricting proper coolant flow. If coolant is full in the radiator than touch your upper radiator hose to see if it is hot. If their is proper coolant level and engine is warmed up to temp and radiator hose is cold replace your thermostat.

Nov 02, 2014 | Cars & Trucks

1 Answer

Heater is not blowing hot air


How old is the coolant in your car? If you haven't changed the coolant in a couple of years, you may have sediment build-up in the heater core that is restricting full circulation in the core and preventing good heat output. Feel both hoses at the firewall that go to the heater core. Are both equally hot when the engine is warmed up and heater controls on high? If only one is hot, and the other lukewarm, the core is partially plugged. Pull off both hoses there and run a garden hose at low volume backward through the core. If not sure what is backward flow just run the garden hose through both openings and see if you can remove any sediment or blockage.
If both hoses are hot, the core may be circulating fine, and the problem may be in the heater case's doors not opening fully- I think that would be the temperature blend door. When heater controls on full heat, the door should be fully open to let blower air pass across and through the heater core to pick up heat and pass on through to vents.

Dec 20, 2012 | 2002 Kia Sedona

1 Answer

No heat in 91 cav


Need to check the coolant level to ensure that it is full. If full, check the hoses going to the heater core. Both hoses should be hot. If one is much colder than the other, you have a stopped up heater core. If that is fine, check to be sure the engine is getting as hot as it should. A stuck open thermostat will not allow the coolant to heat up enough and not blow hot air. If all that is good, check the blend door under the dash. It may be getting stuck in between the hot cold positions and not allowing all the air to flow over the heater core.

Dec 12, 2012 | Chevrolet Cavalier Cars & Trucks

1 Answer

My truck is over heating while driving on the highway and fine while idling


Sadly, the most likely cause for this is a partially-clogged radiator. If the coolant has not been changed at reasonable intervals (every two to five years, depending on the type), you may have rust and corrosion blocking some of the tubes. The engine puts out more heat at freeway speeds than at idle.
You can try having it pressure flushed and new coolant. but odds are you need to replace the radiator. Replace the hoses while you are at it.

I assume that the coolant level is full, check it when cold. Do NOT open a hot radiator. Low coolant level will cause this also.

It is possible that the lower radiator hose is collapsing at speed. If you have never replaced the hoses, you might try having it pressure flushed and the hoses replaced. If that does not help, then I think you need a radiator.

Mar 30, 2011 | 2004 Dodge Ram 1500

1 Answer

1997 Camry 4-cyl fan works but heat very weak - coolant level ok


Probability 1) The thermostat is probably stuck open, coolant is not getting hot enough from the engine to provide heat.

Starting from cold, allow the engine to run and warm up. While doing this, feel the upper radiator hose - you should be able to feel the coolant heating up to the point the hose is uncomfortably hot. If it gets that hot, then go to next step.

Probability 2) The heater core flow is restricted, not allowing full flow of coolant into passenger compartment.

There are 2 smaller heater hoses that run to the firewall. Are either of these hoses getting hot? Both sides hot indicate full coolant flow. Both sides cool indicate heater control valve not opening fully.

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2 Answers

The heater only blows cold air,the radiator is full,thermastat is working and the engine temp is within normal ranges.


I've had this problem. 2000 GMC uses a closed coolant system. Meaning takes and returns coolant from and to the Reserve Bottle and has little air in the engine and heater systems.
If everything appears ok but no heat. "Air Lock" is the most likely cause. (With interior heater set to full heat) Solution; 1. Make sure water pump works. 2. Drain about 1/2 engine coolant into container. 3 Remove both heater hoses from engine side and flush heater core in both directs through heater hoses with garden hose. 4. Reattach heater hoses in correct locations. 4. Refill engine with coolant. 5 Start engine and run for 2 min., use caution when topping up coolant.
6. Most 2000 GMC have twist off caps with plugs located mid way on heater hoses. with engine cold, start engine these caps may be loosened to allow trapped air to escape. Do not attempt with engine hot due to hot coolant injuries. This may take more than one attempt to remove all air from heat system. 7. Lastly most 2000 GMC water pumps have a bleeder plug,( 3/8" square driver plug) located on the water pump. With egine cold this plug should be removed to remove any air. Reinstall plug with thread sealant.
Hope this helps cheers

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1 Answer

Heater not blowing heat only cold


Check the coolant level. It is common for the intake gaskets to leak causing the coolant level to drop. The first thing to stop working when the coolant gets low is the heater. Top off the coolant and determine where you are leaking coolant whether it be the intake gaskets, hoses, radiator, water pump, etc.

If the coolant is full what does the temp gauge say? Once the vehicle is warmed up it should read around the 200 degree mark. If its below 190 than the t-stat is stuck open. Replace the thermostat.

If both of those are fine and the coolant looks like mud than your heater core is plugged. You can try back flushing it with a water hose. Remove both of the heater core hose and use a water hose to flush out the heater core. This may take several tries before you start to feel some heat.

Nov 14, 2010 | 2001 Chevrolet Blazer

1 Answer

No heat


Over heat is caused by poor circulation of coolant. This problem can be: 1- The thermostat is not opening ( bad) causing coolant stagnant. 2- Water pump is bad, not circulate coolant. 3- Radiator is clogging up. It is full but water can not going through small clogging up tubes inside to have heat dissipated through the fines.
Since you also have no heat then I think the bad coolant causing the heater core clogged up also, unless the heater valve has a problem not allowing cooling flowing through the bypass hose to the heater core. Correct all 3 things above then you should be OK. Good luck.

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1 Answer

1985 cadillac fleetwood V8 4.1 blows cold air out but no heat


if you had heat before the problem than there is probably air still in the system . dont know your motor set-up , but it might have a bleed valve on the thermostat housing or a bypass line . if not , start the car and let it warm up ......in the mean time take the upper radiator hose off @ the radiator . When it heats up to normal temp , the coolant should flow out of the hose . that will tell you that the thermostat is opening , and it will also get the air out of the system @ the same time . As soon as it starts to flow , hook the hose back up and tighten . refill the cooling system back to the full line , than check for heat
GM is bad about getting air trapped in the system .

Dec 03, 2008 | 1999 Mercury Cougar

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