Have heating when moving,not when idling?

I drove my daughter's 2005 Corolla today and noticed that there was warm air from the vents of the heat/cool system while I was driving, but it turned cool when sitting at stop lights. The system temperature indicator was midway between H and C, normal.About a month ago the bottom radiator hose came off and she pulled over right away. The hose was put back on and clamped securely and antifreeze and water was put in. She had the dealer check it the next day and they said everything checked OK. Any help is appreciated!

 

Try replacing your thermostat and making sure you are topped off with coolant.

 

Would the temperature indicate OK if thermostat is bad and the heating be tied to motor acceleration? Thanks

 

temp guages are often not that acurate they may very well be reading normal even though the cars running 50 degrees cooler because the thermostat isnt working.
would let the car cool off and check the level in the radiater and resoirver and top off if needed it may just be a little low if it is, would probably check for leaks but often a low system will cause poor heating at idle your thermostat probably is ok if your system is low.

 

After you have driven it until it says it's in the normal range and you are getting warm air when you are driving, shut it off, pop the hood and feel all the hoses especially the heater hose going thru the firewall all of them should be hot, if they are all hot then you have a problem with the heater controls, if the top hose is hot and the bottom cold you have a blocked/restricted radiator, if the top is cold you have a stuck thermostat, if top and bottom are hot and heater hose is cold you have a restriction usually a sensor at the block. Have a nice day. Geo

 

I checked the radiator level and it looked good, the reservoir was about a pint low which I filled. I had it running at idle about 10 minutes and itdidn't have any warm air, I drove it a few miles and it had good warm air. Stopped and I checked the hoses : top radiator hot, bottom radiator cool, top heayer hose hot, bottom heater hose warm. Any thoughts? Thanks

 

Sounds like a problem with the heater controls, maybe a bad fuse or vacuum line, there are a lot of controls on heater functions that were not on cars several years ago, I think you have heat, it just isn't getting into the car. Have a nice day. Geo