Author Topic: HEATER PROBLEMS (Read 5321 times)

Dr.Maxwe001 · « **on:** Dec 16, 2010, 12:48:05 PM »

IF YOU HAVE A TRUCK OR 4 RUNNER OR TACOMA OR LC AND THE HEATER ISNT WORKING POST YOUR PROBLEMS HERE MAYBE WE ALL CAN HELP EACH OTHER OUT .

rockin86runner · « **Reply #1 on:** Dec 16, 2010, 01:00:14 PM »

mine only works half the time .....it cuts in and out and sometimes it only works on high but that im prety sure it needs a new switch

hawaiilux · « **Reply #2 on:** Dec 16, 2010, 01:15:46 PM »

yep your switch is bad it has resistors and theres an open in med

Dr.Maxwe001 · « **Reply #3 on:** Dec 16, 2010, 01:23:51 PM »

se we're already helping one another

junya92toy · « **Reply #4 on:** Dec 16, 2010, 01:43:59 PM »

Quote from: ballzout on Dec 16, 2010, 01:15:46 PM

yep your switch is bad it has resistors and theres an open in med

The resistor isnt in the switch

Dr.Maxwe001 · « **Reply #5 on:** Dec 16, 2010, 01:51:24 PM »

I think it might be the resistor and not the switch from what I have learned in the past few days if it only blows on HIGH then its the resistor

rockin86runner · « **Reply #6 on:** Dec 16, 2010, 01:57:30 PM »

ya thats what i figured it is i havnt found any at our junk yard those are always gone

Dr.Maxwe001 · « **Reply #7 on:** Dec 17, 2010, 05:32:07 PM »

I am trying to figure out of my heater core is bad or not before I put the dash all back together here are some picture i snaped tonight with my phone

I found this pict. online and thought it might help me as well do I need to follow this pict or go another route?

4LoRunner · « **Reply #8 on:** Dec 17, 2010, 05:46:34 PM »

mine also only blows on high, before there was med n high

Dr.Maxwe001 · « **Reply #9 on:** Dec 17, 2010, 05:47:55 PM »

4lorunner your resistor is bad

4LoRunner · « **Reply #10 on:** Dec 17, 2010, 05:56:43 PM »

alrighty thanks and to make it clear where exactly is the resistor

Dr.Maxwe001 · « **Reply #11 on:** Dec 17, 2010, 06:12:19 PM »

86 4 runner I would think its on the drivers side by the gas pedal but I COULD be wrong on that

4LoRunner · « **Reply #12 on:** Dec 17, 2010, 06:29:58 PM »

ok ill have to check and let you kno on that

fade · « **Reply #13 on:** Dec 18, 2010, 01:43:04 AM »

if its a 2nd gen or 1st gen runner its up on the pass side by the heater blower motor held in by 1 or 2 phillips head screws to the floor board. You will feel a wire running off the blower motor to it. It's a lil 1x2"(about) box thing and will screw out and you will deff notice it.

http://www.4crawler.com/4x4/CheapTricks/Blower.shtml

4LoRunner · « **Reply #14 on:** Dec 18, 2010, 10:50:52 AM »

awesome that was very helpful!

santa cruz crawler · « **Reply #15 on:** Dec 18, 2010, 11:17:48 AM »

1980 22r low heat and messed up cabin flow, the ven in front of my shifter
Blows cold heat I've tried every thing w the switchs and nothing
The only heat I get is on heat and def very low heat at good temp

? Nice thread

Tyler82toy · « **Reply #16 on:** Dec 18, 2010, 11:49:08 AM »

Quote from: santa cruz crawler on Dec 18, 2010, 11:17:48 AM

1980 22r low heat and messed up cabin flow, the ven in front of my shifter
Blows cold heat I've tried every thing w the switchs and nothing
The only heat I get is on heat and def very low heat at good temp

? Nice thread

x2 but mines on an 82

wakkjobb · « **Reply #17 on:** Dec 18, 2010, 11:57:04 AM »

Had similar problem on a 79; took the heater/vent controls apart. Ended up being stuck; also the center blend door wasn't moving. It has something to do with how Toyota designed the vents; to me it looked like "vent" didn't pull air from the heater core the way you'd think it would. Been a while, can't remember too much. Maybe it'll get someone else thinking the right way?

>>Dan

santa cruz crawler · « **Reply #18 on:** Dec 18, 2010, 06:07:04 PM »

Huh? any mods or ideas would be cool my fan is strong heater core doesent leak defrost is ok but the heat sucks and so do the vents lol. Any way every thing is in the truck, I checked it out today , I even un did my hoses to the heater core put compressed air through there
No luck , I'm thinkin heat was not a big deal in japan or heat wasn't an option yet!

I might grab a 2gen heater core and see if it's bigger?

wakkjobb · « **Reply #19 on:** Dec 18, 2010, 06:48:45 PM »

It had something to do with the vent/heat door, the L-shaped one. If it was closed, it would use in-cab (cold) air... if opened it'd use heater core (HOT) air. Or the other way around; I'd have to find some pics to show what I mean. I had the entire dash out and apart so I played around with it plenty; just gotta remember what's what. I can see it in my mind, but that doesn't do you much good.

There may be too much of a difference between the 1 and 2 gen cores; cab designs were changed so it may not fit.

>>Dan

85_4RNR · « **Reply #20 on:** Dec 19, 2010, 12:18:31 AM »

On my 88, my cable going to control valve on firewall works. The other one that goes down to another door won't open all the way. In other words, it won't go the way it should when I have lever over to hot. It's robbing me of heat. Any suggestions?

santa cruz crawler · « **Reply #21 on:** Dec 19, 2010, 04:28:40 AM »

Mine only works in between the def and heat, x2 on robbing heat

83 Crawler · « **Reply #22 on:** Dec 20, 2010, 08:37:16 PM »

the blower it self dont work on my 83 it worked fine intill one day it just quit working and i am getting power to my relay so i should just cheak to see if im getting power to my fan?

hawaiilux · « **Reply #23 on:** Dec 20, 2010, 09:57:06 PM »

you need to replace the squirrel cage(the fan) probally if you have power to the fan if not put power to the fan with a 9v battery and see if it work if not its bad////ive got a 80 yota same thing only heat in def and heat. Does not blow out face vents(thats how its hooked up from fact i believe. havent took apart unit but if resister is not right behind switch follow wire to see were it goes has to go to a control...resister,comp find a diagram of cooling sys its very easy to understand and diag

santa cruz crawler · « **Reply #24 on:** Dec 21, 2010, 05:55:32 AM »

I have all the first gen heat stuff Let me know if you need something

Jared88 · « **Reply #25 on:** Jan 01, 2011, 08:11:42 PM »

My girlfriends dad has a 92 2wd, and the heater is blowing cold. the thermostat is operating, and the engine is warming up. all the hoses are getting hot, so....why is it blowing cold now?? thanks guys

81_yota · « **Reply #26 on:** Jan 01, 2011, 08:13:55 PM »

try unpluging heater core

Jared88 · « **Reply #27 on:** Jan 01, 2011, 08:21:13 PM »

Just got done reading a few other posts, sounds like the heater core may be the problem! thanks for the suggestion

81_yota · « **Reply #28 on:** Jan 01, 2011, 08:45:57 PM »

do u know how to flush one

blumagoo · « **Reply #29 on:** Jan 02, 2011, 08:40:19 AM »

I have a 85 that blows luke warm air after the trucks fully warm.
The fan only works on the 2 high speeds so I'll look for the resistor.
The valve under the hood was stuck so I removed it and put in a hose coupling, so it should be hot all the time but still luke warm air.
I'll try flushing the heater core, how do you guys suggest doing that?
I'll be following this thread.
Thanks'

Dr.Maxwe001 [OP]

Dr.Maxwe001 [OP]

Dr.Maxwe001 [OP]

Dr.Maxwe001 [OP]

Dr.Maxwe001 [OP]

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