Rufus E.

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Problem Reported: HVAC Air Flow Switching to Defrost When Accelerating
September 15, 2010, 10:05 PM
<p>The <a id="ce_8277" class="ct_null tooltip" title="Heating and Air Conditioning" href="/heating-ac">AC/heater</a> (HVAC) system may unexpectedly switch to the defrost mode when accelerating. This system is operated by engine vacuum and should be inspected for any vacuum leaks if this problem develops.&nbsp; There is also a revised vacuum check valve available to address this concern.</p>
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