I have a 99 Honda accord and steam is coming from the overflow tank?

Recently replaced a heater hose and Its not the thermostat please help

Hi change the radiator cap the spring has become weal over time and is now letting the pressure escape.

That is where the steam is suppose to come from, so that is working properly and normally. However maybe your rad fan is not coming on if it seems to gets steaming hot fast.

Check for fuses there.

Otherwise less traffic jam traffic and more open highway will cool stuff down without the fan running.

Have an auto electrician or mechanic who knows his stuff check it out.

It should be that simple. Rad cap is fine… It is doing what it is designed to do.