new thermo worked for a little, then stoped. once in awhile it will blast a little heat and then go back to super cold. heater core is still good, wondering what next step i should take in resolving this problem?
Have a '86 coup deville, changed thermostat and heater started workin then quit, works only now and then?
drain the rad slowly fill with waterand antifreez so the thermostat will open then you refill the rad put the cap on and away you go happey motering
