Jump to content

Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse

- - - - -

Very low heat

heater core radiator thermostat coolant

  • Please log in to reply
5 replies to this topic

#1 evilspawn666


    New User

  • Members
  • PipPip
  • 17 posts
  • Spokane

Posted 16 January 2014 - 07:19 PM

Ok guys here is my situation. 87 dl wagon fwd 1.8 no turbo. Just put in new heater core, radiator, coolant and still the car has almost no heat.  Yes the system has been "burped". Anyone know where I should troubleshoot next or maybe an old or current discussion that talks about this?  Also does anyone know off hand where the fresh are vent is located on this car? Thanks.

#2 ruparts


    Subaru Nut

  • Members
  • 565 posts
  • hooper, co

Posted 16 January 2014 - 07:46 PM


  couple of things to check,  is the water control valve actually opening all the way, check under hood and adjust so inside lever is making full open at the valve.  also make sure the heater hoses are not connected to incorrectly,  seems they should not matter but there is a right & not exactly right way they go.   if you are not getting good air flow, that is a different issue and we need to know  more about what it is and is not doing to diagnose.   is the blower  pushing good air flow and just not hot enough , or,  hot enough,    just not enough air flow??   also what temp thermostat you using,   the 180 is pretty weak in dead of winter.

#3 evilspawn666


    New User

  • Members
  • PipPip
  • 17 posts
  • Spokane

Posted 16 January 2014 - 11:11 PM

Yeah, I think I stuck a 180 in it to make sure it would'nt overheat, so you sayin'  I should go with a higher temp one?  Blower is goin' good just low heat. Heater hoses are exactly as they were before I changed heater core. Also, with the risk of sounding like a total idiot, where is the water control  valve ?

#4 86 Wonder Wedge

86 Wonder Wedge

    USMB Regular

  • Members
  • 455 posts
  • Akron, OH

Posted 17 January 2014 - 12:12 AM

There isn't a heater control valve on the EA82s. The temp slider controls the hot/cold blend door position.


Make sure you grab a subaru OEM tstat as the aftermarket ones tend to open before they should.


Also be sure your air direction door controls are working and the blend door cable is connected.

#5 Uncle Ed

Uncle Ed

    USMB Regular

  • Members
  • PipPipPip
  • 87 posts
  • Yacolt,WA

Posted 17 January 2014 - 12:18 AM

IIRC Subaru did away with the water control valve on 85+ cars, instead they use an air mix door to control the temp. The temp cable runs down from the dash to a cam by the gas peddle. If your car dosn't have AC then you could pop the tube off between the blower and the heater to check if the door is fully open. Also check that the passinger side vent is closed. This question has been asked before but for the life of me I can't find the posts right now, try searching for " no heat".

#6 evilspawn666


    New User

  • Members
  • PipPip
  • 17 posts
  • Spokane

Posted 17 January 2014 - 12:44 AM

Thank you guys for the info, next shot I get I'll stick my head up the dash and see if I missed something under there. :lol: Plus maybe a new thermostat.

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users