https://dev.z31library.com/index.php?action=history&feed=atom&title=Forums%2FZ31P%2Fz31-repairs-forums_electronics%2FA%2FC_woes 2026-08-15T15:19:59Z 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/A/C_woes&diff=5977&oldid=prev 2026-05-15T05:16:32Z

<p>Forum archive import (z31performance)</p> <p><b>New page</b></p><div>{{ForumImport<br /> |op_user=bacon<br /> |op_date=2021-10-17 12:59:36<br /> |post_count=2<br /> |archive_url=/Z31performance_archive/forum/z31-repairs-forums/electronics/546152-a-c-woes.html<br /> }}<br /> <br /> &#039;&#039;&#039;bacon:&#039;&#039;&#039; &lt;small&gt;(2021-10-17 12:59:36)&lt;/small&gt;<br /> <br /> I recently R&amp;Rd my dash and heater core box to replace a leaking heater core. After reassembly, the A/C no longer works; it only blows hot, and the ambient temperature reading on the climate control unit reads 45F regardless of the outside temperature. I swapped both a good spare head unit and a good spare ambient temperature sensor into the car, and still got readings of 45F.<br /> <br /> I followed the ambient temperature sensor/circuit analysis according to the FSM. With the circuit open, the dash reading should be -56F, which is what I got. With the circuit shorted, the dash reading should be 181F. I got -13F. What I interpret from this is that I have neither an open circuit nor a short. Does anyone understand what this is telling me, or have any suggestions how to fix this problem?<br /> <br /> All the vacuum lines are good and correctly reconnected.<br /> <br /> ----<br /> &#039;&#039;&#039;bacon:&#039;&#039;&#039; &lt;small&gt;(2021-10-17 23:02:30)&lt;/small&gt;<br /> <br /> Never mind. It turned out I had incorrectly connected two identical connectors under the dash; when I reversed them, everything returned to normal.</div>

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