Hello
I was wondering if anybody could help me...
I have a 99 Acura TL 3.2 and for some reason
my heater will not blow hot air...even if you turn
the AC OFF...this happened last year also but
automatically started working a while later...
if any of you have had experiance with this
problem....please reply...and let me know
what to do....
Thank you

 

Just a guess from a newbie, but have you turned the climate control up? Maybe it's set up at 70c when it should be 80c? I could be totally wrong on this.

 

On climate control do you mean the knob to turn, I put that on 90,
if you are talking about something else please let me know...
Thanks

 

Yeah, that's what I meant. Guess that's not it. No other clue on this end, sorry.

 

I had this same problem a few years ago. Late it back to the dealer. (It was a wiring issue).
Bryant

 

Are you talking about when you've just started up your engine? You know that the heater runs off of the engine coolant, right? So the engine temperature needs to reach operating temperature before the heat really works properly.

 

Quote:

You know that the heater runs off of the engine coolant, right?

Along those lines...make sure your coolant is topped off. If it's not filled, you won't be getting any heat. Also, since the controls are automatic and not mechanical, something may be wrong with an electrical component, or loose connenection for that matter, that is used to open and close your heater coil.

 

Try the thermostat BTW make sure you fill it back up lol I just did mine its a pain in the ass but I was over heating like crazy so try that if its not that and you still have air blowing like you said then its and electronic problem just remember this car was some of Hondas first shot at a electronic climate control unit there was going to be problems with it

 

Also try the heater control valve. It's on the passenger side of the engine up against the firewall.

 

holy thread revival= late answer !!
good effort Tomd12, but if you have knowledge to share, try scrolling down the thread list for current issues, people looking for help- thank you

Did you guys notice the post were from 2002- some 13 years ago~

we do have a sticky heater valve as noted above, Wd40 helps that
and the power issue to cabin fan is the connector just under front edge of glovebox
That melts- wires get loose, bad news in general

you can bypass the connector -easy to rewire it yourself, or install a new one, cost ~25$ at dealer

 

Had this same issue. My heat would come on when it wanted to and then got to the point where the blower fan didn't blow any air even when manually setting it to high. It turned out that my transistor went bad and my blower fan wiring was fine. I did change the blower sub harness for safe measures but it was perfectly fine after 300k miles and 16 years. I recommend changing the transistor which takes maybe 20 min at most.

 

Its a RESISTOR not a transistor
its job is to cut down the voltage to cabin fan = makes fan speed slower for low settings
Odd that it failed without the main power connector failing- that's the usual cause of its demise

 

I agree that it is actually a resistor but the part name is called Transistor Assy. from Acura. Just using Acura's terms I also found it weird that the power connector did not show one bit of melting or burning after that many years and use.

 

my bad then, sorry- stupid acura names that don't match actual parts!

It depends on your use of fan speeds, luck, and who knows... why it fails or doesn't~
Better to inspect and know, than wonder where that odd melting plastic and burning wire smell is coming from!
Especially when the cabin fan wont work to blow some fresh air in! D'oh!

 

I just did this fix, if you search me under the heater issue. I don't agree with using WD-40 on anything other than loosening rusty bolts, it attracts dirt and becomes the problem. On this valve I used liquid teflon, after removing the hoses and cleaning, it works perfect.