Heater

AnthonyLocke Offline

Getting the Wheeling Fever

hello, I have a 99' taco. The heater in it went out for no reason. I checked coolant levels. They're fine. I checked thermostat...it's fine. The heater fan works...it's just not hot air. I'm guessing it's the heater core....i just wanted to let you guys know before I take it in. I usually check all the inexpensive things out and troubleshoot beforehand. give me the knowledge....
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94' YJ in the making...trail rig

Re: Heater [Re: AnthonyLocke] #769044 12/02/06 04:06 AM

Joined: Oct 2002

Posts: 15,887

Toyota & Classifieds Moderator

Hold up. There is a part called a BLOWER RESISTOR which is typically the culprit. Usually lives behind the blower fan.
Dealer-only part for around $25, or hit the local junkyards.

www.car-part.com

Also, a quick-n-dirty check on clogs in the radiator. Run vehicle up to operating temp. Shut off. Lightly touch fingers to radiator fins. Cool spots are clogs.

http://www.walkablecommunities.org/

Democracy is two wolves and a lamb voting on what to have for dinner. Liberty is a well-armed lamb contesting the vote.

**ubi apis- ibi salus**

Re: Heater [Re: kewlynx] #769045 12/02/06 05:36 AM

Joined: Feb 2006

Posts: 40

AnthonyLocke Offline

Getting the Wheeling Fever

is there any symptoms to actually check if it's the resistor?

94' YJ in the making...trail rig

Re: Heater [Re: AnthonyLocke] #769046 12/02/06 05:49 AM

Joined: Oct 2002

Posts: 15,887

Toyota & Classifieds Moderator

You already have a symptom. <img src="/forums/images/graemlins/pfft.gif" alt="" />

I *think* the resistance values are in the FSM sticky'd above. Not sure if the later rigs use the same one. I know the older trucks had 3 and 4 speed blower speeds, but your switch controls that, not the resistor.

You'd have to stick your nose under there to disconnect it anyway. <img src="/forums/images/graemlins/shame.gif" alt="" />

http://www.walkablecommunities.org/

Democracy is two wolves and a lamb voting on what to have for dinner. Liberty is a well-armed lamb contesting the vote.

**ubi apis- ibi salus**

Re: Heater [Re: kewlynx] #769047 12/02/06 06:42 AM

Joined: Feb 2006

Posts: 40

AnthonyLocke Offline

Getting the Wheeling Fever

if it's not the resistor than it's the core? tomorrow i'll start working on it. <img src="/forums/images/graemlins/cheers.gif" alt="" />

94' YJ in the making...trail rig

Re: Heater [Re: AnthonyLocke] #769048 12/02/06 07:31 AM

Joined: Oct 2002

Posts: 15,887

Toyota & Classifieds Moderator

Check the other stuff I told you to also. Cores ARE NOT CHEAP, and they're a beech to tear down to even get to them. Good luck and take your time.

http://www.walkablecommunities.org/

Democracy is two wolves and a lamb voting on what to have for dinner. Liberty is a well-armed lamb contesting the vote.

**ubi apis- ibi salus**

Re: Heater [Re: kewlynx] #769049 12/02/06 08:27 AM

Joined: Feb 2006

Posts: 40

AnthonyLocke Offline

Getting the Wheeling Fever

what does the resistor consist of? is it an electrical looking resistor?if it doesn't control the blower speed? what does it control?it's not in my shop manual.

Last edited by AnthonyLocke; 12/02/06 08:34 AM.

94' YJ in the making...trail rig

Re: Heater [Re: AnthonyLocke] #769050 12/02/06 08:41 AM

Joined: Oct 2002

Posts: 15,887

Toyota & Classifieds Moderator

If you're looking at something that is NOT the FSM, you're NOT going to see it. That's why I pointed you to the one that's sticky'd.

www.4Crawler.com I think he's got a pic of one posted over there. Looks like toaster coils.

http://www.walkablecommunities.org/

Democracy is two wolves and a lamb voting on what to have for dinner. Liberty is a well-armed lamb contesting the vote.

**ubi apis- ibi salus**

Re: Heater [Re: kewlynx] #769051 12/03/06 12:40 AM

Joined: Mar 2004

Posts: 104

Tucson,Az

lawnmowerman Offline

Wheeler

In the original post he says the heater fan works but no heat.If the fan did not work or more likley did not work on all speeds, I would suspect the resistor.No heat could be from a bad valve or it not opening due to a linkage issue.The heater valve is located on the firewall above the valve cover.The heater core being pluged up is another possiblity.

Re: Heater [Re: lawnmowerman] #769052 12/03/06 01:06 AM

Joined: Feb 2006

Posts: 40