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George H.
George H., ASE Certified Technician
Category: Saturn
Satisfied Customers: 807
Experience:  ASE Master Tech 15+ Years
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The heater isn't working in our 2009 saturn vue with auto

Customer Question

The heater isn't working in our 2009 saturn vue with auto ac/heat control
Submitted: 1 year ago.
Category: Saturn
Expert:  AZTechBrian replied 1 year ago.

Hello. Can you feel the heater core hoses and see if they both feel hot? They are 2 rubber hoses, about an inch in diameter and a few inches apart from each other and go into the firewall. See if they are hot, warm, cool. Let me know what you determine.

Customer: replied 1 year ago.
The hoses are warm, but not hot now, but I have been away from the car for a bit.There is a fast clicking noise coming from under the hood in front of the drivers side.
Customer: replied 1 year ago.
The blower blows good, there are no leaks that can be seen. The coolant level is good and tests to 40 degree below zero freeze protection.
Customer: replied 1 year ago.
It did this once before, but miraculously, it solved itself somehow and startEd blowing hot air again.
Expert:  AZTechBrian replied 1 year ago.

I am wondering if the coolant is flowing through the heater core or if the heater core is plugged. If the hoses are hot when the engine is at operating temperature, then the coolant is flowing, but if not then it's probably plugged up and needs to be flushed.

Expert:  AZTechBrian replied 1 year ago.

The fast clicking is probably the relay. I don't have access to my software at the moment, but See which one it is, and swap it with another one and see if the heat works.

Customer: replied 1 year ago.
What about the rapid clicking noise? It has stopped now. I am not worried about a flush and fill, bUtan electrical gremlin that will take hours of labor to track and pin down.
Expert:  AZTechBrian replied 1 year ago.

I think the rapid clicking is a relay. I would try swapping it with a different one to see if it continues to rule out a bad relay

Expert:  AZTechBrian replied 1 year ago.

Did you notice which relay was clicking? or if it was even a relay?

Customer: replied 1 year ago.
just to be clear, flush and fill the entire cooling system, correct? Failing that a relay...where would I find the relay to switch it out?
Customer: replied 1 year ago.
I did not look for it, I just heard it start click I ng
Expert:  AZTechBrian replied 1 year ago.

If it's a relay that's clicking rapidly, I would first swap it with another relay in the relay box.

If the heater core hoses are not hot when the engine is at operating temperature, then you would have to back flush the heater core with a garden hose to clean it out.

Customer: replied 1 year ago.
Where is the relay box so I can swap one out?
Expert:  AZTechBrian replied 1 year ago.

to back flush the heater core, I would suggest you clamp off the one inch hoses to it, disconnect the heater core and run a harden hose through it.

Under the hood, you should find the relay and fuse box on the driver side. I don't have access at the moment to my software, so I can't get you a diagram, but it's where all the fuses under the hood are located.

Customer: replied 1 year ago.
Also, if the heater hoses get hot, then, what am I looking at?
Expert:  AZTechBrian replied 1 year ago.

If they are hot then we will need to see if your getting power at the blend door actuator

Customer: replied 1 year ago.
I will talk later to you about this, ok?.Thank you.
Expert:  AZTechBrian replied 1 year ago.

Sounds good. I'll be around

Customer: replied 1 year ago.
It started blowing got again this morning. I don't understand it.
Customer: replied 1 year ago.
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Expert:  AZTechBrian replied 1 year ago.

I think you have a bad connection or an intermittently failing blend door actuator. Will be hard to figure out though if it's working correctly at the moment.

Expert:  AZTechBrian replied 1 year ago.

I have attached an image of the blend door actuator. item 6. It is accessible by removing the glove box. Next time this happens, check to see if the actuator is getting power and operating.

https://www.dropbox.com/s/0bbb9u3zfqu98ux/a.jpg?dl=0

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