(Home) Heater problem

I have a 1986 masterace surf 2.0efi. to the end of last year had the radiator replaced. Since then I am having intermittant problems with heating at the front not at the back. Before the rad was changed it was warm as toast now it is very poor or none existant. Anybody any suggestions
alan - (#2363) alan, 27 Feb 02

Could be low coolant level or maybe airlocks. Any trouble with overheating or underheating? If the latter, could be the thermostat.
HTH
Ian - (#2365) Ian Dunse, 27 Feb 02