Question about Nissan Altima

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No heat coming from vents

Car will not blow heat Have changed thermostat and temp control panel

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Is the radiator full of good coolent is heater hoses hot if not the water pump may be bad if the hoses warm the problem in side the h vac system

Posted on Nov 23, 2013

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Posted on Jan 02, 2017

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SOURCE: overheating and no heat from the vents

YOU HAVE AIR IN YOUR WATER SYSTEM OR GOD FORBID A LEAK IN YOUR RADIATOR OR THE PIPES CAUSING LOSS OF WATER IF YOU HAVE AIR IN THE SYSTEM THIS CAN BE A PAIN THE BEST SOLUTION TAKE IT TO AN EXPERT

Posted on Oct 27, 2008

  • 30 Answers

SOURCE: coolant doesn't heat up!

the temp sensor just tells you the temp of the coolant and it controlls the coolant fan to turn on and off at a certain temperature........have you check for coolant leeaks???

Posted on Nov 24, 2008

j_del
  • 1586 Answers

SOURCE: car doesn't warm up

It does sound like the thermostat. The sensor does not control the thermostat in any way, it only reads the temperature of the coolant. Your symptoms are classic of a thermostat that is stuck open or partially open. Take it back and tell them what is going on and have them show you that the thermostat is fine.

Posted on Nov 24, 2008

  • 3 Answers

SOURCE: no air or heat blowing from vents

if the fan is blowing this could be a problem with the climate controll switch that changes the direction of air from floor to defrost to vents, some are vacuum controlled through a vacuum operated mechanism that opens and closes a door in the vents which redirects the air to different places.

Posted on Jun 10, 2009

  • 497 Answers

SOURCE: driver's side air blowing warm, won't change

Sounds like there is a crack in the vent that leads to the drivers side, and hot air from the engine is leaking through.

Posted on Aug 29, 2009

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Heater temp on high only bows luke warm air after driving. A/C works just fine.Plenty of cold air from it


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1998 Toyota Camry 4 cyl.only blows warm air from heater when car is unning for say ten min. When I start driving the temp gage goes down to cold and blows cool air, no heat. I changed thermostat and...


Your radiator cooling fan will only come on when the engine temp has reached the point where it needs to have air forced through the radiator and thus bring engine heat back down to safe operating range. If your heater is not working check to make sure the fresh air vents aren't stuck open (are the controls stiff or not going all the way across?) check also that the heater shutoff valve lever which is usually situated on the firewall at the rear of the engine and can be found easily by tracing the hoses back from the thermostat housing aren't bent and/or seized up.

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No heat coming from heat vents, blower works. i have change thermostat still no heat


Make sure the cooling system is full ... they can run with low coolant and not have it show on the temp gauge. Make sure the heater temp control actual opens the valve the controls the flow of coolant to the heater.

Sep 20, 2010 | 1994 Toyota Pickup

1 Answer

Heater not working


What does that mean? It blows air but not hot air? It doesn't blow air at all with A/C or heat? I assume you mean it blows, just not hot. If so, make sure your car is running at operating temp. If the car isn't warming up, your thermostat is stuck open and the coolant can't heat up enough to transfer heat from the heater core to the air you're blowing out the vents. If your car warms up to operating temp just fine, you may have a heater core issue. Your core may be clogged with corrosion thus not allowing heat transfer as well. If the valve on the inlet hose to your heater core is bad it won't allow hot coolant into the heater core, once again no heat to the air blowing out your vents. One of these is most likely your issue. I hope this helps.

Feb 03, 2010 | 1995 Ford Escort

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My 2005 impala is only blowing heat on the passenger side of the car, the driver side blows cold air what could be the problem


Inside the venting which is located behind the dash board panel underneath. Behind temp controls and radio. Inside this venting, is a couple different flaps that move to direct air to different locaitons of the car when you change the temp settings. THe flaps can get stuck or the little actuator that moves it can become faulty and will not move the air flap. You will have to manually take apart the venting system and ind the flap and actuator and see if you can manually move it. Check actuator to make sure it is not cracked or leaky or disconnected.

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Driver's side air blowing warm, won't change


Sounds like there is a crack in the vent that leads to the drivers side, and hot air from the engine is leaking through.

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Cheak to see that the coolant fan is operating with the A/C turned on. The fan has to work to help the engine stay cool and help the A/C. When you apply heat on the control it acts to reduce the coolant temp. You will have to get the coolant fan operation checked. This can be :fan motor, fan relay, temp sensor and computer. Good luck

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