Heater problems

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Overheating

Hyundai Elantra 2012 Limited 100000 miles
After driving for maybe 20 min. In 87deg. F. The temperature gauge goes to red line. Note: should fans go on by the radiator when temperature goes up?
Is their a sensor or fuse that we should check or me being old school it would be the thermostat?
Kris from United States 8 years ago  
KR
6 reports 
Smartblonde from United States 7 years ago
Thermostat is a good first move but there is also a cooking temperature sensor that should be on the block. Yes the fans should kick on if they are too hot. Have u checked the hoses for the correct temps or to see if pregnant? Another thing to check most people forget about is the heater core if u turn on the heat does the temp go down?if it does then it's the thermostat if not possibly the heater core may need replaced and please fill the antifreeze up thru the reservoir with the car running so it doesn't create a bubble that will cause overheating until the air is released from the system.
Comment

Heater blows cold air

Hyundai Elantra 2018  450 miles
From the get go the heater has not worked. I only have seat heater and steering wheel heat! Korean made vehicles have this issue Canadian made cars don’t! They deny the problem existed before I bought the car! But they also said others have this and they are waiting for an update from Korea to fix the issue. It was a cold winter and at times had frost on inside of car.
Trudy from Canada 6 years ago  
TR
1 report 
Elantra17 from Canada 6 years ago
Judy, I have a 2017 Hyundai Elantra and it also has no heat. Dealership tested the heating system in a heated shop, then Hyundai Canada sent me an email telling me there is no problem with the heating system. I was told in December it was a software problem, then January I was told to wait for parts. I filed a claim with CAMVAP, I have to much invested in this car not to see this through with binding arbitration. Contact me at jmd7645@hotmail.com
Comment

Over heating

Hyundai Elantra 2013  61387 miles
My car over heat after about one hour drive to the point where the water boils.
PATRICK from other 5 years ago  
PA

Starting

Hyundai Elantra 2000  200000 miles
I need some help with my Elantra. There is no problem to start the engine but, when turning it off and starting it back, it won't work. I've already checked spark plugs, wiring and the electrical system and don't know what else to do. It is only after a waiting for a couple of hours that the engine will start again. The coil is not heating and I have no idea what it can be its problem. I would really appreciate any help.
nando from United States 9 years ago  
NA
1 reply 
Elvira from United States 9 years ago
I am a mechanic and, by the things you are talking about, I would definitely say it is a coil's failure. There are two types of coils for the Elantra, one with a single connection and another one with three. Check which one is yours.
Comment

Revolutions drop

Hyundai Elantra 1999  275794 miles
After driving my car for a while without any problems, when the car is finally warm, revolutions suddenly drop and the car cannot be accelerated. All of a sudden, it speeds up alone but remains with the problem. Only after turning it off, it will start working normally again. There is no overheating, only a failure when warm.
reynold from United States 8 years ago  
RE
3 reports 
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