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Heater not working and code P0483

Tiny
LHEATON
  • MEMBER
  • 2007 SUBARU OUTBACK
  • 4WD
  • AUTOMATIC
  • 140,000 MILES
P0483 code came up on my car. My mechanic hasn't seen this code before. My car isn't overheating or anything the only issue is my heater isn't working, the fan won't blow any air. Is there any idea what this might mean I have to fix?
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Saturday, October 19th, 2019 AT 6:05 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,289 POSTS
The code P0483 Cooling Fan Rationality Check Malfunction is the definition. There are three fuses and two relays that needs to be checked. here is the cooling fan wiring diagrams so you can see how the stem works and which fuses to check. These guides will help. Also does the cooling fan come on when you turn the AC on?

https://www.2carpros.com/articles/how-to-check-a-car-fuse

and

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Here are the fuse panel and relay locations. Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
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Wednesday, October 23rd, 2019 AT 11:52 AM

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Step 1 - A heater cannot operate unless the engine is full of coolant/antifreeze. If coolant level is low check the system for leaks.

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