I have a 93 Accord which is blowing cold air. This problem started happening just after I changed my heating hose. I am wondering if I have any trapped air in my cooling system. How do I get rid of the trapped air? I tried opening the radiator cap with heater set to max and let it run for 10-15 minutes. I see the water in the radiator heat up and expand and spill out, but couldn't really see any appreciable level drop in the radiator. What could be my other options?

The thermostat seems to be working fine (my engine seems to warm up like before).

thanks.

 

have you bled it already?

 

try bleeding it. crack open the bleeder valve on top of the thermostat housing and turn the car on. you should see coolant pour out but DO NOT close it until it is streaming a steady line of coolant