How To Fix A Car Heater...?

It seems that my car heater isnt working on certain occasions. it works most of the time buy when i use the air conditioning one day, the next day in the car the heat won't work. this will go on for about a week when suddenly it works. im not certain that there is a connection between the air conditioning but it would be a strange coincidence if not.
 
There are connections between the a/c and the heater. the switch and the blower resistor motor might need to be checked, if they are working properly.
 
there is a door that opens and closes in the lower dash..if it sticks it want move or it could be the electric turner for the door..if it doesn't work ,turn off and on the heat and a/c,sometimes it will make the door move,,you'll have to take it to the shop for a complete answer to the problem.
 
use a good radiator flush then replace the fluids in the radiator its cheap and easy ..
 
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