97 Camry has heat at idle,but driving temp gauge goes down and no heat,and it's cold out---thanks

 

Check for a stuck open thermostat. This item controls engine coolant temp which also circulates through the heater core.

 

Agree with Toyomoho 100%.

 

Thanks,do you think it's a diy

 

Yes, if having some mechanical skills a DIY.

The radiator will need to be drained of coolant. Before starting the job obtain service manual info. Perhaps a Haynes manual, your library may have manuals, search internet for "changing thermostat + your engine model." If 4 cylinder a 5S-FE if V6 engine a 1MZ-FE.

Also check the current coolant level in the radiator (engine cold) and make sure the overflow reservoir is at the required level. Low coolant can also cause your problems.

 

Thank you guys so much ---it worked,---and I did it

 

Great, good job!

 

Congrats!