I have a 95 pontiac bonneville and im having trouble with the heater. it blows cold air!, my boy friend can get it to blow hot air but after i drive to where im going and shut it off it blows cold air...
Sounds simple like just your thermostat needs replaced. Tell your boyfriend to open the hood and locate the biggest hose coming off the top of the radiator and follow that hose into the engine block. Right there where the hose goes into your engine, there is a semi-bell-shaped housing with 3 little 5/16" bolts on it. Take those bolts out. Be careful right here because there is water in that hose and it will spill out. Inside that housing is your thermostat. Pull the old one out, clean up the flange faces where they will bolt back together with a putty knife or a piece of sandpaper, being careful not to let any particles get in the water or the hose. Then just put the new thermostat in, (make sure it goes in the correct way as it has to open the correct way to let the warm water through), replace the gasket, (the gasket should come with your new thermostat) and bolt it back together. The new thermostat should be available anywhere, from your local auto parts store, to the local NAPA, AutoZone, even WalMart, for about $10 or $12. Good luck!
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