The heater is fine running around town but on motorways the heater is useless
Recently fitted a brand new, genuine Ford thermostat.
Has anybody else had this problem? How was it rectified?

 

maybe the heater matrix is blocked also try taking the 2 pipes of the heater and put a hose pipe through it failing that maybe a new one BUT dash has to be removed well most of it to do it

 

yes have the same problem with mine saff cosworth have fited new rad and thermostat and now dose not get very hot or takes long time .

the temp gauge sits low on the gauge around town is there a different thermostat i can use ?????

 

try swapping the two hoses under the bonnet for a few miles might a air lock in internal heater have tried and does work