Heater blowing cold air - AC Auto Repair Help Forum


	Auto Repair Home	SEARCH POSTS	WHO'S ONLINE	LOG IN

Automotive Repair

Car Troubleshooting Topics
  Car Troubleshooting
  Engine Troubleshooting
  Engine Fault Codes
  Electrical and Wiring
  Transmission Problems

Car Repair Topics
  Car Making Noises
  Car Stereo Repair
  Heating or AC Issues
  Motorcycles and ATVs
  Tricks of the Trade
  Truck Repair Advice

Site Options:
  Login
  Sign up here!

Latest Forum Post

2011 Dodge Nitro OBD scanner seems to drain battery in 10-20 minutes

When I bought this car in summer 2023, a...

Grounding Cable, 2017 Jeep Renegade Trailhawk

The Cable that connects my negative batt...

Rough Idle (Found new thing)

Hi everyone. First of all sorry for bad ...

equipment

hey yall. im a first year engineering st...

HELP

I have a 1956 1/2 ton panel truck, 69 35...

Howdy

    Just wanted to s...

ABS/Tractiob/Brake Lights on But No DTCs

Hello all, Recently while driving m...

Chevy strut replacement

I'm trying to get a sensor of some kind ...

2020 suburban new transmission and issues after install

recently had the transmission fail at 11...

Caliper piston post cleaning won't screw in

Hello, 2013 Hyundai Elantra limited (ma...

Heater blowing cold air

Sign up here!

Email This Post

Auto Repair Home>> Automotive Repair>> AC Auto Repair Help Forum

managermania
New User

Dec 3, 2019, 9:07 AM

Post #1 of 5 (1713 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 (1709 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 (1705 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 (1678 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 (1667 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.

Email This Post

Search for (options) Privacy Sitemap