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Heater blowing cold air

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managermania
New User

Dec 3, 2019, 9:07 AM

Post #1 of 5 (2017 views)
Heater blowing cold air Sign In
Have an Infiniti 2015 QX60. When you turn the heat on, it only blows cold air and also the car temp gauge in the dash does not heat up. Any thoughts/ideas on what the cause is?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 3, 2019, 9:44 AM

Post #2 of 5 (2013 views)
Re: Heater blowing cold air Sign In
 With the engine at full operating temp, locate the 2 heater hoses where they go into the firewall and feel them to see if they are both hot to the touch.

If they are not, then you may have a plugged heater core or bad engine thermostat.

If they are both hot, the heat in that vehicle is controlled by a blend door that regulates heated air flow. it is operated by an electric motor/actuator. The problem can be that the actuator is stripped or inoperative or the door itself could be damaged. This is what needs to be determined by examining the actuator and see if it is responding to heat change commands or not.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



managermania
New User

Dec 3, 2019, 9:47 AM

Post #3 of 5 (2009 views)
Re: Heater blowing cold air Sign In
Thanks! I will check it out.


managermania
New User

Dec 3, 2019, 1:38 PM

Post #4 of 5 (1982 views)
Re: Heater blowing cold air Sign In
Haven't been able to check it yet, but my wife said that the temperature gauge in the dash goes to almost half way when idling, but goes all the way down to C when driving.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 3, 2019, 3:05 PM

Post #5 of 5 (1971 views)
Re: Heater blowing cold air Sign In
Do the tests I requested and then we will talk about the results.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.






 
 
 






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