my heater stopped working, i have no clue what happened. all it does is just blow air now. also, what is the best oil for starting in the mornings at around 40 degrees F. but later in the day warms up to around 80 and later on in the year it will be around 55degrees F. and around 100 during daytime

 

What are the symptoms of the failed heater? DOes it blow anything? Does the fan work? Does the AC still work? Can you change the vents that blow (feet, dash, face, etc.)??

 

everything works except for hot air blowing, ac is cold, air gets pushed out stong. just no hot air, even when warmed up. as for oil??? do you know whats best

 

The oil lists are in the manual. I'd reccomend 20W-50 for 40F as 40F is not really that cold car-wise If you're having problems, drop the W viscocity to a lower number.

If all your vents and your logicon works fine, check that your heater core is getting anti-freese pumped into it.