thermastat working waterpumps working engine not overheating only cold air blowing out why?

john, November 2013

I am not sure on your motor but a lot of heater control valves are electronic now and are prone to seizure,also feel the two heater hoses at the bulkhead,if they feel cool you may have an air lock or your heater rad. may be blocked,all these things would be worth a look

cdc, November 2013