Ac in my 2004 Nissan sentra worked fine until I turn on the heat for one day. Now heat comes out of the vents when I turn on the Ac. Ac worked fine until I turn on the heater for one day. Now the Ac is blowing heat. Why?
Vent flap shutting off?
SOURCE: Dashboard and tail lights out on 97" Nissan Sentra
I took my pathfinder to U-HAUL and asked them to check the towing lights. There was a pinched wire by my tail light and they cut it and changed it out for me, it was $5. I am so glad that I didnt take it to Nissan. My second step was going to be getting a new dimmer switch..but the guy who worked on my car said that wouldnt be the problem. He also told me that replacing a fuse that kept blowing out was dangerous and after the first time to get it checked out. Learn something new every day!!
SOURCE: over heating. no heat from heater
Hello,
You need to replace the Thermostat and gasket very quickly as you are damaging the engine when it overheats. Your thermostat is not opening at all preventing the coolant from reaching the engine, cooling it off and sending the now heated coolant into the heater core to keep you warm. The shaking may or may not go away once this is fixed.
Good Luck!
Rich Lilja
SOURCE: 2003 Nissan Sentra Problem overheating and heater doesn't work.
I had this exact problem a few weeks ago. The repair shop first changed the thermostat. Didn't fix the problem. Next step, they found the radiator was clogged. They replaced the radiator and now everything works fine.
SOURCE: 1996 nissan sentra ac/heater switch works only on high. need help
I had the same prblem. There is a relay next to the heater blower that needs to be replaced.
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