AC/Heat
Join Date: Jun 2009
Location: Fort Worth, Texas
Age: 64
Posts: 13,456
Received 885 Likes
on
689 Posts
Re: AC/Heat
Sounds like another Duovalve failure.
MOST complaints of a Crossfire (and many Mercedes) blowing hot air with hte A/C on are not A/C failures, they are duovalve failure. The duovalve is the gate thru which hot water flows to the heater cores. Unenergized = full flow and hot air. SOmehow, they tend to stick OPEN not closed.
Watch the video:
MOST complaints of a Crossfire (and many Mercedes) blowing hot air with hte A/C on are not A/C failures, they are duovalve failure. The duovalve is the gate thru which hot water flows to the heater cores. Unenergized = full flow and hot air. SOmehow, they tend to stick OPEN not closed.
Watch the video:
Join Date: Jun 2009
Location: Fort Worth, Texas
Age: 64
Posts: 13,456
Received 885 Likes
on
689 Posts
Join Date: Jul 2009
Location: Central South Carolina
Age: 69
Posts: 5,842
Received 375 Likes
on
325 Posts
Re: AC/Heat
Sounds like another Duovalve failure.
MOST complaints of a Crossfire (and many Mercedes) blowing hot air with hte A/C on are not A/C failures, they are duovalve failure. The duovalve is the gate thru which hot water flows to the heater cores. Unenergized = full flow and hot air. SOmehow, they tend to stick OPEN not closed.
Watch the video:
How to..Mercedes monovalve, duo valve cleaning,checking - YouTube
MOST complaints of a Crossfire (and many Mercedes) blowing hot air with hte A/C on are not A/C failures, they are duovalve failure. The duovalve is the gate thru which hot water flows to the heater cores. Unenergized = full flow and hot air. SOmehow, they tend to stick OPEN not closed.
Watch the video:
How to..Mercedes monovalve, duo valve cleaning,checking - YouTube
It is a 'failsafe' that the valves are open when coils are de-energized.
Thread
Thread Starter
Forum
Replies
Last Post
JCostakis25
Troubleshooting & Technical Questions & Modifications
4
04-23-2016 08:18 AM
DCobray
Troubleshooting & Technical Questions & Modifications
5
06-19-2011 02:59 PM
Louie K
Troubleshooting & Technical Questions & Modifications
2
08-29-2009 01:37 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)