Dehumidifier/AC freezing me out

[The Metal Butcher]

I'm one of those wierdos that likes to just run on "vent" and not AC when the ambient temperature is ideal. As a result, I turn down the temp to "Lo" or 60 to have no heat from the mix door, and all is well. Until, that is, the truck decides it is too humid and turns on the AC which freezes me out. So I turn the temp up to 70 or 72, and it's fine until the AC cycles, then it is too hot. I hate this. So typically the truck ends up winning and I either have to run AC the whole way, or turn the system off and roll down the windows.

All I want is the fan on, and the AC to not be able to to turn on. I really don't want to have to wire in a hard switch that physically disables the clutch, but I don't see any other options, unless it can be coded out to not turn the AC on when the button isn't depressed.

TIA

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[Ryom]

The A/C compressor is a scroll compressor and it's much more efficient than older technology. It's also a variable speed compressor and as such it will dial down the power if extreme cooling isn't needed. All you are accomplishing by setting it to 'LO' is to force it to run the compressor at maximum power and speed instead of allowing it to step down.

It really is a modern HVAC system, so I'd recommend not worrying if the compressor is running or not and just set it to a desired temperature and let it maintain it. If you want a dumb HVAC system, you've simply bought the wrong vehicle (or just roll the windows down).

That's not sass, it's just the way it is.

You might also consider redirecting the flow away from the upper vents and to the defroster and foot vents to prevent the air-stream from hitting you directly if you are sensitive to the change in temp during cycles.

 

[The Metal Butcher]

That is

The A/C compressor is a scroll compressor and it's much more efficient than older technology. It's also a variable speed compressor and as such it will dial down the power if extreme cooling isn't needed. All you are accomplishing by setting it to 'LO' is to force it to run the compressor at maximum power and speed instead of allowing it to step down.

It really is a modern HVAC system, so I'd recommend not worrying if the compressor is running or not and just set it to a desired temperature and let it maintain it. If you want a dumb HVAC system, you've simply bought the wrong vehicle (or just roll the windows down).

That's not sass, it's just the way it is.

That is good to know about the compressor technology, but it should not be on if the button is not pressed! Period!

All new vehicles are wrong in some way or another, as are all old ones...

 

[Ryom]

Make sure recirculate is off so you don't build up humidity and set your blower speed higher to keep the air mixed well. That's about the most you can do without disconnecting the compressor.

 

[matmondro]

Try turning it down to LO, pressing the vent/panel button for flow direction, and manually setting the fan speed. In this configuration, the AUTO button should have no lights on. If the A/C button is lit up too, press it to manually turn it off. This should keep the compressor from engaging.

 

[Tom 71 Maverick 24]

That is


That is good to know about the compressor technology, but it should not be on if the button is not pressed! Period!

All new vehicles are wrong in some way or another, as are all old ones...

I agree 99% with the exception of Max defrost where the dried air is helpful. If I don't turn on the AC, that means that I don't want the AC.

 

[MakinDoForNow]

Try turning it down to LO, pressing the vent/panel button for flow direction, and manually setting the fan speed. In this configuration, the AUTO button should have no lights on. If the A/C button is lit up too, press it to manually turn it off. This should keep the compressor from engaging.

LO keeps compressor active and shoots for uncontrolled lower limit on temp with AC at max capacity (much below 60 if possible as you are asking for) You can select 60 (or whatever you want) as a target temp as desired set temp is several degrees (5-6+) lower than ambient it will max cool until it gets close and then reduces rate of cooling. Set the fan speed to 1 and temp to ambient of 75 or whatever. Consider if ambient is 68 then heater will raise temp. Fan speed of 1 will slow down rate. Your AC may need fixing if it never leaves setting of HI or LO. You want to keep defrost/dehumidify active if for no other reason than to keep condensate from forming on electrical components inside cabin!!

 

[matmondro]

LO keeps compressor active and shoots for uncontrolled lower limit on temp with AC at max capacity (much below 60 if possible as you are asking for) You can select 60 (or whatever you want) as a target temp as desired set temp is several degrees (5-6+) lower than ambient it will max cool until it gets close and then reduces rate of cooling. Set the fan speed to 1 and temp to ambient of 75 or whatever. Consider if ambient is 68 then heater will raise temp. Fan speed of 1 will slow down rate. Your AC may need fixing if it never leaves setting of HI or LO. You want to keep defrost/dehumidify active if for no other reason than to keep condensate from forming on electrical components inside cabin!!

With the A/C manually switched off by pressing the button, and setting temp to LO, the compressor will not run. In that configuration, along with the airflow direction manually selected, e.g. panel/vent, you are manually overriding the whole system and telling it to not blend in any heat from the heater core and only bring in fresh air from the cowl intake. Or, not condition the fresh air coming in from the cowl. This configuration but just set at HI will just do the opposite with the blending, giving you full heat from the heater core.

 

[vandeda2024]

That is


That is good to know about the compressor technology, but it should not be on if the button is not pressed! Period!

I agree wholeheartedly. It's poor programming on Ford's part in my opinion. If it's on auto, go for it, do what you want. If it's on manual control, leave it where I set it ... afterall, that' why I don't have it on auto.

While the compressor is more efficient than times past, i still take a mpg hit as the compressor does require power to it.

I'd love a future update to make manual hvac control actually be manual control (and My View to remain on screen when restarting the truck too!)

 

[DWV]

Just set your temperature to ambient or a degree lower and the AC will not run enough to bother you.

 

[The Metal Butcher]

Try turning it down to LO, pressing the vent/panel button for flow direction, and manually setting the fan speed. In this configuration, the AUTO button should have no lights on. If the A/C button is lit up too, press it to manually turn it off. This should keep the compressor from engaging.

I do that except for setting the flow direction. I never use auto. I will try when I am home. Obviously defrost will turn it on, so I'll pick the other two. I genuinely think that it decides for itself if it thinks the humidity is uncomfortable.

With the A/C manually switched off by pressing the button, and setting temp to LO, the compressor will not run. In that configuration, along with the airflow direction manually selected, e.g. panel/vent, you are manually overriding the whole system and telling it to not blend in any heat from the heater core and only bring in fresh air from the cowl intake. Or, not condition the fresh air coming in from the cowl. This configuration but just set at HI will just do the opposite with the blending, giving you full heat from the heater core.

It will run. Unless setting direction stops it.

Just set your temperature to ambient or a degree lower and the AC will not run enough to bother you.

It clearly is bothering me, or I wouldn't have made the thread.

 

[DWV]

I do that except for setting the flow direction. I never use auto. I will try when I am home. Obviously defrost will turn it on, so I'll pick the other two. I genuinely think that it decides for itself if it thinks the humidity is uncomfortable.



It will run. Unless setting direction stops it.


It clearly is bothering me, or I wouldn't have made the thread.

Then you didn’t understand my suggestion, just set it for ambient temperature, which is what you said you wanted.
This is really a first world problem.

 

[The Metal Butcher]

Then you didn’t understand my suggestion, just set it for ambient temperature, which is what you said you wanted.
This is really a first world problem.

Can you verify that the blend door is fully open to the outside with no heat from the heater core at that setting?

Second, when the AC turns on–which it will do anyway–do you honestly believe it holds the temperature?

Yeah, 1st world problem, with a 1st world solution. Run the AC all the time. But that's what I don't want to do.

 

[DWV]

The answers are: no, yes, the AC does not run all the time only when it is programmed to run. But then I have an XL, which being basic may operate differently from higher trim levels.

I only use manual mode, or off.

 

[Cherokee]

Controlling my cabin temp is so simple. I cannot fathom anyone having trouble with what I believe is one of the most effective and efficient A/C’s. I’ve ever had in any vehicle.
Even when I run it in manual mode.

But I did have to read a little in the owners manual about the auto air/dual air thing.

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