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Discussion Starter · #1 · (Edited)
Hey Gents..

I have a Toyota 2007 Camry LE 2.4 185k runs great except for today....I turned my heat on and it ran warm/hot for 10-20 seconds then turned cool (not hot/or even warm). All levels fluid okay, check hoses one coming from top of engine (going to top of radiator) consistently was hot and the one from the bottom of radiator was hot for a second or two then turn cool while heater was running full blast.. Outside temp here in NH is about 44 degrees. I have been told by the local parts store that it is a restrictive heater core, another man said it is the thermostat and yet another said it is door not opening...Merry Xmas to me and my head is spinning Any help out there would gladly be appreciated very very much
Buddy :surprise:
 

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You might get better answers in the proper Camry forum - there are several - all based on year.

You may have a problem with the system that controls blend door action. I would try the following first as it is easy to do.

With engine cool - remove radiator cap and ensure your coolant is full. Check overflow bottle level as well.
Top up if necessary. Leave radiator cap off. Elevate front of car as high as you can get it to lift. A floor jack comes in handy. Car in P and parking brake on. Start car and turn on heater fan and set temp to max heat. Once temp gauge is where it normally gets to, blip the throttle a number of times. Helps to wrap an old sock around neck of radiator. Don't stick it in the radiator. Fit the sock to the rad. neck. This is to help keep coolant from getting all over the place.

Point of this exercise is to ensure you don't have air in the system.

I suppose it's possible the thermostat is stuck open, but I kind of doubt it. Toyota t-stats last a very long time.
 

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Corolla, Camry, Tundra, Camry, Avalon, Highlander, Venza, Highlander
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Back washing the heater core is a good start. Then flush the system with http://prestone.com/enmx/node/1168
Make sure that you add full strength coolant to make up for any water left over in the heater core after back washing.

Install a new OE thermostat and radiator cap.

Buy RMI25 and dose per their directions.
http://www.rmi25.com/faq

http://www.toyotanation.com/forum/1...2-2006-camry-heater-core-diy.html#post9086929

And the correct forum for your year/model vehicle:
http://www.toyotanation.com/forum/104-5th-6th-generation-2002-2006-2007-2011/
 
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