Mazda Pickup Trucks While Mazda may not be known for their trucks, they have always produced quality reliable trucks for both hauling cargo, or simply crusing.

Ptc heater

  #1  
Old 11-05-2017, 12:31 AM
Junior Member
Thread Starter
Join Date: Oct 2017
Location: Washington
Posts: 3
Default Ptc heater

New to Mazda’s and am not familiar with the PTC heater. The fuse in the dash is blown, replaced and blew as soon as I turned the key on. I just purchased a 1986 B2000 very clean and well kept. I noticed a big change when I replaced the hose that goes from air snorkel to the heat shield on the exhaust manifold. I know the stock carbs are junk and there is a Weber in the plans.

So back to the subject at hand, the elusive PTC heater. Also temp gauge in dash is in op, I also noticed lower radiator hose was not as warm as it should be, so probably needs a thermostat also.

So thanks in advance for any help.
 
  #2  
Old 11-05-2017, 04:17 AM
Super Moderator
Join Date: May 2012
Location: Queensland Australia
Posts: 3,534
Default

PTC heater?
 
  #3  
Old 11-05-2017, 07:30 AM
Junior Member
Thread Starter
Join Date: Oct 2017
Location: Washington
Posts: 3
Default

On the bottom of the dash fuse panel there is a 20 amp fuse marked PTC heater. So that’s my question also, what is it/where is it.
 
  #4  
Old 11-05-2017, 08:44 AM
Cusser's Avatar
Senior Member
Join Date: Mar 2007
Location:
Posts: 460
Default

The PTC heater is between the intake manifold and the stock carb, pre-heats stuff when the weather is colder. I removed my PTC on my 1988 B2200 when I went Weber in 2005, must still have mine sitting somewhere. If you unplug the PTC heater electrical connection on the engine and the fuse doesn't blow, then your PTC heater has a short, up to you whether to replace it.

I think your immediate issue is that you did not get all the air out of the cooling system when you replaced such hose - this air bleed out is somewhat difficult to do on these trucks. I jack up the front end, remove radiator cap, turn heater on, and run the engine, topping up with 50/50 as necessary; this bleed out of the air might take 20 minutes. Then cap radiator, turn of engine, lower, etc.

Your thermostat may be fine. I run a Stant 192/195F here in Arizona and do not run hot, but mine has a replacement radiator as well, and 215K miles.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
willfitz
Mazda Pickup Trucks
0
08-09-2008 11:32 AM
bdsutto
Mazda Pickup Trucks
6
11-13-2005 12:06 PM
JMan
Mazda Pickup Trucks
1
08-17-2005 02:13 AM
jdempsey57
Mazda 323,Mazda 626 & Mazda 929
2
06-12-2005 04:02 AM
pilgrim
Mazda Miata (MX-5)
0
12-16-2004 06:06 AM


Thread Tools
Search this Thread
Quick Reply: Ptc heater


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.