Low Coolant Level for Inverter Circuitry

[54Ford]

I have a 2014 Energi with 45k miles.  The coolant level in the reservoir for the inverter box is approaching the low level mark.  Have others experienced this or do I have a small leak somewhere?

Any ideas are appreciated.

Thanks!

[Lacienega]

I have a 2014 SEL and mine was low too around 65k miles. Filled it up and kept an eye on it....seems to be OK now at 107k miles. No idea why it was getting low.

 

[plus 3 golfer]

Evaporative coolant loss and water permeating hose walls is normal .  Ford topped mine up several times in the numerous times I took my car in for recalls. Last time I recall me topping mine up was when I changed spark plugs at around 105k miles.  I just checked both coolant levels and at 134 k miles both levels were down to minimum.  So, I got out my 50/50 coolant jug and topped off.  

A quick internet search indicates normal coolant loss can be as much as 1 inch per year (which is close to the distance between min and max on the expansion tank). I changed plugs about 3 years ago.  So, it looks like I might lose about 1/3 inch per year or perhaps 1 inch per 30 k miles in hot AZ climate.
 

 

Edited December 5, 2020 by plus 3 golfer

[grege]

Our 2017 and 2018 both would lose some initially during the few months of "being new".  I check all fluids once to twice per month and have not had to add any coolant in many months.  I too purchased a 50/50 ford mix and simply add a few ounces whenever I see the levels drop and always make sure to check that no puddles are left under either car.  

 

Greg 

[jestevens]

I had similar thing around 60K mi, the dealer service filled it for free when I pointed it out to them.  I still bought the orange jug of pre-mixed coolant just in case.