Heat not working?

[toosday]

I'm not sure if I'm the only one or If I did something wrong when I installed my Intake but my heat only works if I'm driving over 5k RPMs but as soon as I stop it goes back to freezing.

 

[SuperFudd]

Check your coolant level.

 

[$ub$onic]

Lots of threads about heat issues.

Normally stemming from low coolant.

Please search before you post a new thread.

Best way to search is by google: sonic owners forum heater issues