Inverter Pump noise

I can't edit the title. But the main issue is MPG. I get from - This - video

If what he says is true- The guy says that if your inverter pump makes that noise, its bad.

Does this mean, if it EVER makes that noise, its bad? I'm wondering, mine does do that. i hear it on occassions randmonly. Somtimes after turning it off i hear it doing this as i get out of the car. And yesterday as I was stopped at a red light, which I think I have heard on a few occassions before too. No codes from my Creader Elite T- last time I looked.

after getting the car, a few months later I got the red triangle of death. I took the battery out, reconditioned multiple times all of the little packs and found one with low voltage and replaced it. Mileage did come back up again to around 50ish mpg in town driving and still got 45+ on the interstate.

Lately, it seems to come and go. But not over 50mpg regularly in town driving like it was not long ago. Im sometimes at the pump seeing @50MPG, but not often, and on my inside dash gauge, tells me im getting 45mpg most of the time. And its usually pretty on.

I know running the heater lowers mpg. And that moves onto another problem- So even if I turn my heat off, I have air from the outside coming in; not recirculating. And I feel air coming from the vents. If i turn it on recirculate i dont feel any air but, the problem is is I cant tell if its hot or not. So, if heat is OFF, then whyy would i feel any heat? So I checked the heater screen, and so my temperature is set at 77 or something. but its OFF. So I turn on the heat so i can adjust this temp, and if i turn it down to 70 or lower, no heat will, as its blowing out while heater is off, will come out. But I still thinks its a tiny bit heating up. The problem is, is if the car thinks the heaters on, it runs the motor more often; lowering MPG, to make the temperature of the air coming out warm. So for some reason the car thinks heat is on, gets it to the temperature set- and by doing this, rujns the motor more often, also killing my MPG. That doesnt seem right and I cant find no way to completely eliminate this.

I do think I have mostly eliminated it but I dont know if 70 means heat on or not. If its comparing it to outside temps of like 50, wou9ld that mean heat on?: is it ocmparing it to outside temps to decide to turn it on or is it at a certain number it turns on and off?

But somtimes just to go back to my mpg problem and me thinking its (at leat part) an inverter pump issue, i do get close to regular mpg. but it seems lower than usual.

So 2 questions - inverter pump. Is it bad if I EVER hear that noise? and how much is too much? And 2, is something wrong- and can you pinpoint me to it, with the heating system actually running, and My theory is default it will run the engine more if it thinks the temperature needs to be raised of the hvac, and doing this means running motor= lower mpg.

 

The video says 'inverter coolant pump' and the noise it has it the noise I'm hearing from my car. So I don't know what to think. What would show me if the coolant inverter pump is going out? And what does that noise have to do with if I have an issue that it needs fixing?

The guy in the video seems to be a professional at working on the Prius'.. so I dont know what to think. Does this indicate a problem? Or nothing, but maybe something I can check to see. Its really a MPG issue.

 

What I'm seeing, which I dont think is normal.. but My thoughts on how this would work makes sense, but this way its doing it makes me sense its broken.

You turn heater on. Car engine turns on more often to keep the radiator fluid heated up to get the temperature youve set your heat to to reach that temp. MPG drops.

But I would think, turn off hvac- its like in analog systems, you move a valve that shuts the fluid from running through the heater core off. If air is blwoing through the vents - like because of some leak, doesnt really matter-(unless it does in this case but if so, i can shut that off by turning on recirculate but it doesnt make no difference because mpg still sucks) the valve seeming to in conjuction with sending fluid through the heater core still after hvac is turned off, the temperature number setting, is still got the car turning hte engine on and off to regulate and get any air through your hvac system- through the heater core- to reach the number of temp you set it on.. even with Hvac OFF.

This doesnt seem in some ways, to be the normal operating procedures. And some system - my guess that tells if water is running through hvac- then it detects the temp number and tells the engine to produce that temp of radiator fluid that would equate to that degrees coming out of the vents- is stuck on. Something operates the engine turning on and off. Sure the number Temp does, but the ON/OFF switch- is off on the screen, but how the engine or whatever sets this to on- turning motor on and off, how it detects ON/OFF might be from soemthing different, could be if fluid passes through heater core or not. Im guessing its that. If its that or the thing that turns the water to bypassing on or off through the heater core that might be broke.. Or it could just be teh brains that tells it to turn it on and off- but it will turn it off if AC is on. So it wouldnt be just stuck, it would be turned on heat. I think also it may get stuck on AC if i turn the temp down too low. Havent rechecked it lately been pretty cold, but "thought i remembered" turning it way down to bypass any of that speculative -compares temp on screen to outside temp- to decide whether to turn on heat or AC. but that would make my AC on off button basically useless. IDK if anybody knows anything more about this weird- turns on engine- system operating procedure that could fill me in on the possible problems.

So ok back to question 1 too, how can i tell if the inverter pumps blown? Any videos. I can trust the vdieos i can trust information here. That dude he seems to be a Prius' specialist. in my perspective ive got information on both sides. Ive heard a video where it showed the CCV making noise, but it seemed to be simliar but slower. Mine is exactly like in that video in OP. Cant find this other one that talked about the slower similiar noise. but thats what made me go for the inverter is bad guess.

 

Ok found some info in the comment section. Also a possibility of what it might be.
so anyone have any idea.. what sensor their talking about exactly? Would that lead to my heater problem? What does this valve operate exactly? Just the hvac system heater side?

 

the heater has to work off of this somehow, to tell when to turn the engine on and off. Heater use and mpg correlate.

 

or maybe its possible, even if i cant feel it, -example when i turn off vent from outside and turn on recirculate(cant feel it) the fans still blowing anyway... yea idk how im not hearing the fan from the inside- but the mpg is still down compared to what temp i set the temperature at on the heater whether on not i turn it on vent from outside or recirculate. but air blowing over the heater core would also lower the engine temp and cause it to turn back on to hold coolant at a certain temperature, too.