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No heat below 2000 RPMs


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2019 ST with around 40K miles. 

 

We get no heat at all unless you are above 2000 RPMs.  Then it works as normal.  

 

I did see a code using Forscan about a coolant pump- but it never turned on the light, it's just stored.  I will pull it again and get the number.    

 

I also tried the method to recalibate the HVAC system and everything didi what it was supposed to in that process, but nothing changed.  


I'm about to take it to the dealer, but I thought I'd make a post here first to see if the hive mind has knowledge.    

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  • 1 month later...

Cheked the coolant first thing.  

 

Now that it's hot- it's doing the same thing in reverse, kind of. 

 

Wife says the A/C get's warm on the highway or at RPMs above 2000.  Slow down or drop the RPMs and the A/C goes cold again.

 

It's going to the dealer soon, I have no clue what it's doing. 

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  • 2 weeks later...
Posted (edited)

So it was low coolant after all.  

 

Turns out coolant was leaking into the cylinders.  Needs a replacement engine.  

 

Ford is covering a longblock replacement under the 5yr/60K powertrain, which was going to expire in July.   Has 40K miles on it.  Drive it home and we are waiting for the new engine to come in to get it replaced.    

 

It's the first Ford I've ever had trouble with the shortblock, and I've owned quite a few.  

Edited by IWRBB
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  • 4 weeks later...

Yep, less than a month left.  

 

We got it back- seems OK, but after having it for 2 weeks it came back with the added bonus of a door ding.  Now we have to get the dealer to acknowledge it was thewir staff that dented it- and get it fixed.  

 

This is why I avoid taking my cars to anyone and service them myself whenever possible...

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  • 5 months later...

So we sold the ST.

 

After the engine was replaced- the problems started. 

 

Things the dealer touched or swapped from engine to engine started to fail.

 

The first was a total limp mode failure on the highway 1 month after we got it back.  Crankshaft Position Sensor + Wiring Harness + Tow = $1100  

 

The second was a failure of the high presure fuel line (!).  That in my opinion, should be something that never fails.  Fuel sprayed all over the engine and another $2400 to fix.  

 

Ford acted like they had nothing to do with either failure.  

 

Thinking about those two quick failures after the engine swap, along with the ongoing rattling sunshade Ford refused to do anything about, the wipers that sometimes stopped working in the rain (not good at all), and the overall general level of pain it takes to service the ST- I decided to trade it for a 2024 ST Line with the 2.0L instead (poser). 

 

It has noticably less power, but it has SO much more room in the engine bay.  The Edge ST is *by far* the worst thing I have ever worked on in the last 40 years of servicing my own vehicles.  Look at nearly any spot on the engine from the top down and you'll find:  turbo air tubes, then vacuum hoses, then metal hard lines carrying oil to/from the turbos, then some electrical, then rubber cooling hoses, then fuel lines, then more electrical harness, then PCV hoses.  Maybe after you remove all of that, you might be able to catch a glimpse of the fastener you are after for the sensor you still can't even see without using a mirror.    The engine bay is small in general.  It's just downright brutal in every aspect.  

 

If you Edge ST owners can still get extended warranties, I'd recommend getting one.  Flood Ford ESP.  Search it up.  The hours of labor required to service this vehicle drives the cost of any repairs way up. 

 

When I mentioned the level of pain required to service these vehicles, the service writer said "be glad it doesn't have a hybird system slapped on top of all of that."    

 

I hope you guys have better luck than we did!  I still love all of my other Fords, but our 2019 Edge ST was really bad from a reliabilty standpoint.  

 

 

Edited by IWRBB
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