Go Back   Mazda Forum - Mazda Enthusiast Forums > Mazda Vehicles > Mazda Pickup Trucks
Sign in using an external account
Register Forgot Password?
Search


Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 10-13-2005, 09:33 PM
 
Join Date: Oct 2005
Posts: 6
Default No Heat

Hey - I have a B2600 with carb (did they come EFI?)

I didn't pay a lot for the truck, so I didn't pay a lot of attention to what worked and what didn't work either.

Anway...

The engine is not getting warmed up, and therefore I am not getting any heat in the cab. I already replaced the thermostat, and that didn't help. The heater blower works, but only tepid air comes out. The temp gauge on the dash moves only slightly from a cold start to operating temp.

Any help on what might be the problem would be greatly appreciated. I really don't want to spend a lot on this truck, so I am hoping it is something simple.

Thanks
Register today for free or log-in if already registered to remove this ad!
Reply With Quote
  #2  
Old 10-14-2005, 12:03 AM
Senior Member
 
Join Date: Sep 2005
Posts: 1,446
Default RE: No Heat

After the engine warms up, does the upper radiator hose get hot? Generally, if you can only hold the hose for about 2-3 seconds, its about 180 degrees. If you can grab it and hold on for a long period of time, it is about 120-130 degees. If it is hot, are your heater hoses getting hot on both sides? What degree thermostat did you go with, and what brand? Just asking because i put an Autozone thermostat in my 323 and it opened way to early and same problem no heat. So I went to put in a Stant brand, and I had heat.
__________________
2008 Mazda 3 Grand Touring 5 Dr. M/T
Phantom Blue
Window Tint 35/5
Reply With Quote
  #3  
Old 10-14-2005, 12:48 AM
 
Join Date: Oct 2005
Posts: 6
Default RE: No Heat

I will have to check the brand. I bought it at NAPA.

The top hose gets hot. I can only touch it for about a second. I will check the heater hoses. I guess I better get a Chiltons because I don't know where they are or what they look like.

thanks so far.
Reply With Quote
  #4  
Old 10-14-2005, 01:00 AM
Senior Member
 
Join Date: Sep 2005
Posts: 1,446
Default RE: No Heat

Sounds like the engine is at normal operating temp. It could possibly be a bad heater control valve or a plugged heater core itself. I have also seen people bypass the heater core if it leaks also. Never know what you will find with a used car!
__________________
2008 Mazda 3 Grand Touring 5 Dr. M/T
Phantom Blue
Window Tint 35/5
Reply With Quote
  #5  
Old 10-14-2005, 01:02 PM
 
Join Date: Oct 2005
Posts: 6
Default RE: No Heat

is it true that the heater core is buried under the dash? Thats going to suck if it is true.... I don't know if I have the time or hutspa to deal with that.

Do you know where the gauge sensor unit is in relation to the heater core? I guess what is puzzling me is that the engine does seem to get hot, but the gauge only moves slightly. I am wondering if the sensor is somewhere closer to the heater core where it might be behind the blockage????
Reply With Quote
  #6  
Old 10-15-2005, 10:24 PM
Senior Member
 
Join Date: Sep 2005
Posts: 1,446
Default RE: No Heat

The heater core is located in the air handler box behind the dash. IF the heater core is blocked, what I have done is to remove the heater hoses and connect a garden hose to clear it out.

Quote:
Do you know where the gauge sensor unit is in relation to the heater core?
Do you mean the sensor for the temp gauge? I just didn't quite undertand most of the last paragraph, and what you were trying to ask. The temp sensor is on the cylinder head near the thermostat housing. Should have a one wire connector and be about a 14mm wrench size. As far as a possible blockage, I speak of inside the heater core itself. If you have never seen a heater core, it looks like a miniature radiator. can become plugged internally. I would be sure to check the heater control valve which is inline of the heater hoses.
__________________
2008 Mazda 3 Grand Touring 5 Dr. M/T
Phantom Blue
Window Tint 35/5
Reply With Quote
  #7  
Old 10-17-2005, 11:25 PM
 
Join Date: Oct 2005
Posts: 6
Default RE: No Heat

Hey bkey71 - I appreciate your trying to help out. I am giving up and will be taking it to a shop... I don't have the time or knowledge to deal with this one.

I will post afterwards and let you know what all it ended up being.
Reply With Quote
  #8  
Old 10-17-2005, 11:33 PM
Senior Member
 
Join Date: Sep 2005
Posts: 1,446
Default RE: No Heat

I guess being in the great northwest you want to get it fixed soon! Winter is just around the corner.
__________________
2008 Mazda 3 Grand Touring 5 Dr. M/T
Phantom Blue
Window Tint 35/5
Reply With Quote
  #9  
Old 10-18-2005, 09:50 AM
 
Join Date: Oct 2005
Posts: 92
Default RE: No Heat

the easiet way is to take it to a gararge to get it fixed, you don't want to mess up the truck worse then it is
__________________
04 silver mazda 3 hatch
Reply With Quote
  #10  
Old 11-13-2005, 02:29 PM
Senior Member
 
Join Date: Jul 2005
Location:
Posts: 175
Send a message via AIM to Kyrasis6
Default RE: No Heat

Quote:
I would be sure to check the heater control valve which is inline of the heater hoses.
Factory manual does no list any such heater control valve and I have never heard of any vehicle older than perhaps about a 98 having such a devise. Most cars coolant constantly flows through the heater core and hot or cold air is directed using a series of flaps. These flaps are prone to fail in Mazda trucks, my dad and I have owned 3 so far that has had this problem, heater core was fine but when you put in into heat the flaps where stuck in the vent position.

Either way though its probably best for an inexperienced person to just take it to a shop.
__________________
View My Truck Garage
Reply With Quote
Old 11-13-2005, 02:29 PM
 
 
 
Reply

Tags
04, 2005, 2008, 323, core, gauge, heat, heater, heati, hot, mazda, stuck, temperature, tribute, truck, valve


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Advertising

Featured Sponsors
Vendor Directory
Our Sponsors
Med Center Mazda
Pelham, AL 35235


All times are GMT -5. The time now is 10:32 AM.

Internet Brands, Inc.



SEO by vBSEO ©2010, Crawlability, Inc.