Heat mode switch
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Mountain Pass
Joined: Nov 2005
Posts: 206
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From: Baltimore,Md.
Heat mode switch
Good Afternoon everyone.
I have a 2001 F-350 S/D w/7.3. Question is... Is it possible for the mode switch( one controls floor/ defrost and A/c ) to not function or should I say leave the a/c on even if it is not in a/c position? What I have noticed was that when it is in the floor mode or the vent mode ( not the floor/vent ) the compressor does not come on. When it is in vent/floor or either a/c modes it does. Is this normal... I don't think so though I do know anytime the a/c is switched on compressor should come on but no time without a/c being on.. Maybe I'm wrong
I have a 2001 F-350 S/D w/7.3. Question is... Is it possible for the mode switch( one controls floor/ defrost and A/c ) to not function or should I say leave the a/c on even if it is not in a/c position? What I have noticed was that when it is in the floor mode or the vent mode ( not the floor/vent ) the compressor does not come on. When it is in vent/floor or either a/c modes it does. Is this normal... I don't think so though I do know anytime the a/c is switched on compressor should come on but no time without a/c being on.. Maybe I'm wrong
Elder User
Joined: Mar 2011
Posts: 661
Likes: 8
From: Ontario , Canada
When is the a/c running? It is normal for a/c to run in the defrost and defrost/floor positions as well as of course the a/c positions. The a/c runs in the defrost positions as it aids in defrosting the windshield.
Thread Starter
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Mountain Pass
Joined: Nov 2005
Posts: 206
Likes: 0
From: Baltimore,Md.
You guys obviously didn't read the whole post. I said it runs in the vent/floor position as well as in the a/c modes and the defrost modes/ I know it is supposed to run in the defrost and the a/c modes. It also run in the floor/vent mode as well but it does not run in just the floor or vent modes
Hotshot
Joined: Jan 2004
Posts: 19,760
Likes: 1,079
From: St Louis
And you did not read my post.
If you had read and followed it the first time, I wouldn't feel compelled to tell you to go read it again so that you can learn how the system was designed to wok. Your owner's manual EXPLICITLY answers your question.
Link to HVAC FAQs and manuals are in my signature (below).
If you had read and followed it the first time, I wouldn't feel compelled to tell you to go read it again so that you can learn how the system was designed to wok. Your owner's manual EXPLICITLY answers your question.
Link to HVAC FAQs and manuals are in my signature (below).
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Mountain Pass
Joined: Nov 2005
Posts: 206
Likes: 0
From: Baltimore,Md.
Project I stand corrected . I am sorry for the rant but I have never seen nor heard of this before. I have download the manual as this truck has none with it. Again I am sorry>
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Mountain Pass
Joined: Nov 2005
Posts: 206
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From: Baltimore,Md.
Okay now that you have straightened me out about the a/c portion.. My next question is.. Why would the heat come out very hot after warm up and then start blowing cold and blowing antifreeze out of the radiator cap. Could it be the water pump or thermostat. I put a new thermostat in it but it still does it and the temperature gauge never climbs above the 1/3 mark?
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