Hey Scotty, I've been having heater problems with my 05 Tucson for the past few years now. I had the thermostat replaced, heater core flushed twice (And once recently by myself) and yet the heater doesn't work for any longer than a couple of days. Every time I flush the cooling system, the heat works fine - until a few days later, it stops working again. I have about 255,000kms on the car, no rust - even though I live in Canada (apart from very minor surface rust that I fixed myself), I take really good care of my cars and this one is no different. But, winter driving in -30C weather is a PITA just relying on the heated seats just to keep you warm.
It runs and drives great. I get about 400kms on a full tank of gas, but I blame that mostly on my driving habits. And other than the heater giving me problems, I still get cold AC - without anything else giving me problems. The car was originally passed on from my father to me, he would've traded it in 2 years ago because of the heater problem - but the Hyundai dealer was only going to give him $1,000 for it even though the car is worth around $7,000 back then. He now owns a 2019 Elantra GT N - Line, with the 1.6L Turbo motor with the 6-speed manual. That car is fast.
We had the Tucson since it was brand new in 04, I've had it for about 3.5 years now. It's slowly becoming a project car to me since I'm building a supercharger kit for it. The tiburon had the same motor 2.7L V6, so swapping the aftermarket supercharger over (and tuning it) isn't that much of a problem for me.
But the only thing that's stumping me is the heater problem. I rather not tear apart the dashboard to fix whatever is broken in there...but I will if I have to...
Any ideas? Thanks
Check if the hose going to the heater feels hot
@mountainmanjoe
Yeah, it gets pretty hot to the touch. Sometimes the heater decides to work, sometimes it doesn't...I can bring the car through a car wash, and suddenly the heater works again - until the car cools down overnight.
while its running try unplugging the heater return hose to see if coolant is getting pumped through it.
Also, it could be the temperature blend door.
When you say "not working" you mean it blows cold instead hot right? Not it doesn't blow at all , or blows somewhere else.
@mountainmanjoe
It blows cold air or as cold/warm as it would get without the AC on. The blower motor and AC works fine, it's the heater that just doesn't want to work all the time.
Yeah, temperature blend door...I've heard that from someone else. 'cause sometimes the heater works, like going through a car wash it'll start working again, but whenever the car cools off - it doesn't work again.
@mountainmanjoe
I mean... I can deal with the heater not working for another winter, that's not much of a deal to me other than it will be damn cold again in the car. I'm not exactly looking forward to tearing apart the dashboard again, so hopefully, it's the blend door otherwise I am not looking forward to replacing the heater core.
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And yes, both hoses have coolant going through them.