Question about 2003 Nissan Sentra

1 Answer

2003 nissan sentra no heat blows cold air. already changed th thermostat

Garage supposedly did a block test and have air in the coolant. they are saying it's the head gasket. just not sure how much I believe them considering in the same week the same garage said my other vehicle needed an intake gasket. seems funny that two different vehicles both need the engine expensively fixed.

Posted by Anonymous on

Ad

1 Answer

Jeff Armer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Nissan Master
  • 15,575 Answers

Check the heater hose's going in through the fire wall ,are they hot ? Both hose's ! This is something you can do yourself ! If they are hot probably the temp actuator is bad or the door is stuck on the cold or heater core clogged ! Video's on youtube showing what to check. Learn to double check your mechanic !
How to Fix Car with No Heat Easy

Posted on Dec 16, 2017

Ad

5 Related Answers

Anonymous

  • 1 Answer

SOURCE: heater blowing cold air

My 05 sentra with 79k miles heat will warm up and then get cold after a mile of driving, we have tried to get the air pocket out, the mechanic stated he thought it could be a blown head gasket, another mechanic said it was a bad heater core. Any advice would be appreciated.

Posted on Dec 05, 2009

Ad

Anonymous

  • 1 Answer

SOURCE: Head gasket is damaged. 2005 Nissan Sentra, 1.8

i have a 2005 1.8 nissan sentra.i rplaced the radiator becuause it was leaking.so when i did i took it for a test drive and the needle went to hot then back down to middle ways between the C & H BACK IN FORTH.so i replaced the thermostat. now as far as i can tell it is staying in the middle of C & H. i can't feel no water though cerulating through the top or bottom hose of the radiator. so now that i told you what i done so far my question is???? ( my heater is not working in the car it is blowing out cold air & i left the car runnng for about 45 min. even took it up and down the road.still cold air.what do you think i need to do?????????? )

Posted on Jan 07, 2010

Steven Wingert

  • 67 Answers

SOURCE: 2003 Nissan sentra 2003 gxe, had 4 yrs, no

Start the car up when it is cold and rev the engine up for 30 seconds,loosen up the radiator cap and see if there is pressure there..If there is you probably have a bad head gasket...Caution do not open cap if engine is warm...

Posted on Mar 01, 2010

alicantecoli

Colin Stickland

  • 22485 Answers

SOURCE: 2003 nissan sentra gxe 1.8

only one thing will cause this problem and thats the head gasket ,its pressurising ,no heat either as water is being blown out ,sorry to give the bad news

Posted on Dec 12, 2010

Scott Matthews

  • 96 Answers

SOURCE: Hi my name is celeste

Does the engine heat up to operating temperature??? It could be a clogged heater core, so a reverse flush may just help.

Posted on Dec 14, 2010

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

How to purge heating system on a 2003 nissan sentry


This system has to be purged of all air. This has to be done at a shop that has this tool. It basically vacuums out all the atmosphere just like an HVAC vacuum pump. It then sucks in the coolant thus no air pockects.

Mar 29, 2015 | 2003 Nissan Sentra

2 Answers

Ya I have a 2002 Nissan sentra,the car temp gauge goes to max heat ,,but its blowing cold air inside the car ,,,and im already in cold weather ,,got any ideas" could really use some help!!


yeah, low on coolant, or a blockage in the cooling system. I would do the thermostat first, should be simple and fairly inexpensive.

If you need further help, reach me via phone at https://www.6ya.com/expert/tom_1788908372a4836f

Dec 24, 2014 | 2002 Nissan Sentra

1 Answer

2003 nissan sentra is blowing cold air i changed thermostat stillblowing cold air i did notice that heater core hoses are both cold car is not overheating


remove both hoses from engine that passes through firewall to heater. put a stiff piece of wire in the hole and make sure it is clear. If there is no restriction, then the heater is choked up

Jan 17, 2013 | 2003 Nissan Sentra

1 Answer

2003 nissan sentra gxe heater core


The problem is likely in your heater case doors, not the core itself. These doors are either vacuum operated or small motor operated.

Get the car warmed up, then feel both heater hoses. Both should be hot, meaning coolant is circulating. If only one is hot, the other cold, then you have a circulation problem.

Feb 23, 2018 | Nissan Sentra Cars & Trucks

1 Answer

Hey i have a 2003 Nissan Sentra 1.8L with 100000 miles on it and just recently the heater began to blow cold air most of the time and on some random occasions it would blow warm. i replaced the thermostat...


The actuator that controls the heat and air has probably gone bad or the control that tells the actuator what air temperature you want has gone or is going out.

Jan 21, 2011 | 2003 Nissan Sentra

1 Answer

2003 NISSAN SENTRA HEATER BLOWING AMBIENT AIR. JUST REPLACED THERMOSTAT AND HOSE AS IT WAS OVERHEATING, BUT NOT LEAKING. SERVICE ENGINE LIGHT JUST CAME ON LAST WEEK.


let the engine get cold, and remove the radiator cap, fill the system to proper level and re test. run engine until thermostat opens, fans come on, then alow to cool again and re check engine coolant. If this does not work, or the thermostat does not open the thermostat is instaled backwards, remove and reposition.

Nov 17, 2009 | 2003 Nissan Sentra

2 Answers

No heat


My 2005 Nissan Sentra 1.8s with 55,000 mi. blows cold air from the heater. Coolant not circulating in engine. Lower hose stays cool to touch. Both heater hoses cold. Changed thermostat - didn't fix it. Coolant not leaking or dirty. None in oil - no oil in radiator. Changed worn water pump belt - pump spins freely with no noise or resistance. Cooling fans come on after warm-up. Temperature gauge stays in normal range then jumps to hot and back again. Coolant good to 10 below - didn't freeze here yet. No other problems or repairs to car. Afraid to drive and make worse. Help!

Oct 10, 2009 | 2005 Nissan Sentra

4 Answers

Heater blowing cold air


My 2005 Nissan Sentra 1.8s with 55,000 mi. blows cold air from the heater. Coolant not circulating in engine. Lower hose stays cool to touch. Both heater hoses cold. Changed thermostat - didn't fix it. Coolant not leaking or dirty. None in oil - no oil in radiator. Changed worn water pump belt - pump spins freely with no noise or resistance. Cooling fans come on after warm-up. Temperature gauge stays in normal range then jumps to hot and back again. Coolant good to 10 below - didn't freeze here yet. No other problems or repairs to car. Afraid to drive and make worse. Help!

Dec 22, 2008 | 2002 Nissan Sentra

Not finding what you are looking for?
2003 Nissan Sentra Logo

Related Topics:

1,133 people viewed this question

Ask a Question

Usually answered in minutes!

Top Nissan Experts

Marvin
Marvin

Level 3 Expert

85239 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

Thomas Perkins
Thomas Perkins

Level 3 Expert

14847 Answers

Are you a Nissan Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...