https://dev.z31library.com/index.php?action=history&feed=atom&title=Forums%2FZ31P%2Fz31-repairs-forums_electronics%2FManual_Climate_Control_Issues 2026-08-15T16:42:44Z Revision history for this page on the wiki MediaWiki 1.43.8 https://dev.z31library.com/index.php?title=Forums/Z31P/z31-repairs-forums_electronics/Manual_Climate_Control_Issues&diff=5941&oldid=prev 2026-05-15T05:16:20Z

<p>Forum archive import (z31performance)</p> <p><b>New page</b></p><div>{{ForumImport<br /> |op_user=MHarmer<br /> |op_date=2019-05-05 00:23:47<br /> |post_count=4<br /> |archive_url=/Z31performance_archive/forum/z31-repairs-forums/electronics/543231-manual-climate-control-issues.html<br /> }}<br /> <br /> &#039;&#039;&#039;MHarmer:&#039;&#039;&#039; &lt;small&gt;(2019-05-05 00:23:47)&lt;/small&gt;<br /> <br /> Hello, I have a Shiro with a manual style climate control. I have power at the plug and the air blows but it only goes to defrost. My A/C button engages the compressor as does any defrost setting. My bellows and vacume lines appear to be intact. I have a suspicion that my control box is bad. Any thoughts?<br /> <br /> ----<br /> &#039;&#039;&#039;Reds89:&#039;&#039;&#039; &lt;small&gt;(2019-05-10 02:40:57)&lt;/small&gt;<br /> <br /> I had an issue where I was getting only full blast heat unless the blend door was all the way over to the left. Did the same, diagnosing the vacuum lines and bellows, and they all looked to be operating correctly. I changed the control box and that solved my problem. So I would locate a used one and swap it out.<br /> <br /> ----<br /> &#039;&#039;&#039;MHarmer:&#039;&#039;&#039; &lt;small&gt;(2019-05-12 01:32:11)&lt;/small&gt;<br /> <br /> Thanks a lot. I will try to source one!<br /> <br /> ----<br /> &#039;&#039;&#039;Kevpilot:&#039;&#039;&#039; &lt;small&gt;(2019-07-01 01:31:01)&lt;/small&gt;<br /> <br /> Probably a dumb question…but when you say control box, do you mean the actual dash control panel? Hot/Cold/air direction?<br /> <br /> My &#039;84Z has the same type of issue. The temp is stuck on hot no matter where the temp controller is moved.<br /> <br /> Also, the air will only blow out of the windshield defrost regardless of which selector button is pushed.</div>

z31p_MHarmer