Elantra heater problem

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Elantra heater problem

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Elantra heater problem - 11/29/2007 3:27:14 PM

barns123

Posts: 2
Joined: 11/29/2007
Status: offline

Hi, I have a 2001 Elantra. When i come to a stop at a stoplight the heater blows cold air but when I start back up it starts blowing warm air again. Any help would be greatly appreciated!

Post #: 1

RE: Elantra heater problem - 11/30/2007 7:32:11 AM

cruiser69

Posts: 11
Joined: 11/21/2007
Status: offline

Hi there! Well, it sounds like you have a vaccum door problem in the climate control system. This means the air flow door behind the dashboard is not staying open when you stop due to loss of pressure in the vac hose to keep it open. Thats why when you accelerate, you are creating more pressure in the line and so the door opens again. This was a very common problem on many Ford cars who used a similar design. This is just an educated guess of course because thats what was wrong with my car. Does the air switch to the vents or defrost when you stop or does it not come out at all?

(in reply to barns123)

Post #: 2

RE: Elantra heater problem - 12/29/2007 9:02:57 AM

nobodyfamous101

Posts: 1
Joined: 12/29/2007
Status: offline

it is the thermostat. i've had an '03 and an '04 elantra and had the same problem in both of them. the car was under warranty still and they replaced the thermostat and the problem was gone. good luck.

(in reply to barns123)

Post #: 3

RE: Elantra heater problem - 12/29/2007 7:56:56 PM

madindian1

Posts: 267
Joined: 12/26/2007
Status: offline

the 01 elantra doesn't use vacuum to control the vent doors and if there was a problem with the thermostat then the car would take a long time to warm up or overheat depending on the condition it is stuck in. stuck open would take a long time to heat up/get warm, stuck closed would cause the car to overheat. what that seems as if the coolant is low in the car so there isn't enough coolant in the system so when the car is driving the water pump pumps coolant through the system faster therefore moving the hot water in the heater core to provide heat. check the basics first. make sure you have coolant in the system. hope it helps

_____________________________

if i'm not doing **** at work i will help you

(in reply to nobodyfamous101)

Post #: 4

RE: Elantra heater problem - 1/28/2008 10:04:29 AM

jsiferd

Posts: 2
Joined: 1/28/2008
Status: offline

I have had the same problem with my 2003 Elantra! Actually about a year ago, the heater wasn't working properly and the car was also overheating- so I got the thermostat replaced. However, once again this winter, having the same issues with the heater. When I give it gas, it warms up and when I break or slow down at all, it's ice cold again. I will check the coolant, but I'm really hoping it isn't the thermastat again since I only replaced it a year ago.

(in reply to barns123)

Post #: 5

RE: Elantra heater problem - 2/20/2008 6:50:47 PM

Vercruz27

Posts: 3
Joined: 2/20/2008
Status: offline

This condition is normal

Due to flow issue port on the heater core inlets & outlets also thermostat ports size. Hyundai is aware of the issue. They have tried different size thermostat housing, No help

(in reply to jsiferd)

Post #: 6