Hobart glasswasher: code E3, not working, not pulling rinse aid

This is a low temperature machine. So detegent and sanitizer go in together and the rinse aid goes in at the rinse cycle. At the lines in the right containers. It is pulling sanitizer at the rinse cycle?

Page 11 of the manual leads me to belive it may be priming. Do you have non return valves in the lines of all the product? Your lines should be full of chemical all the time with no air spaces.

https://www.hobart.com.mx/pdf/ManualOper/F38404%20man.pdf

Your detergent supplier, Hobart, Ecolab, Diversey will often help with issues like this for no charge. Don't let them play with metering though. That is an old trick to get the salemen more sales. ;>)
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F20 only appears on Washing machines.

E2 error code on Hobart dishwasher E0, E2, E3 & E4 - This appears if the machine isn't filling or filling high enough. When any of these codes display, the unit won't run. Check out our troubleshooting guide for possible causes.Jul. 17, 2019

Hobart Dishwasher Error Codes ' Parts Town

https://www.manualslib.com/manual/1292664/Ecomax-G404.html?page=33

Yes, it has two pumps

A model number would be handy...
Take it the thing fills OK (possibly a bit slowly?)

Unboosted machine look at water pressure/flow (clogged strainer; shared supply; scaled boiler outlet);
Boosted machine look at booster pump (motor dead; impeller broken; capacitor failed)

It sounds like the rinse aid has run out or is not dispensing. streaks on glassware is the usual symptom of this. Check and refil the dispenser. On the final rinse, open the door and you should see soap foam , which will let you know the rinse aid has ejected, or alternatively, if you havent had to fill the dispenser in a long time, I would say its not ejecting. these are not usually repairable and you will have to purchase a new rinse aid dispenser from the manufacturer. I always suggest usung " finish" rinse aid, its the best.

Did you solve your problem?It takes 8 minutes to fill.I'm a hobart tech,let me know.

Error Code E3 relates to a problem with the fill. Specifically that the water level has not been recognized at the middle water sensor. This can be caused by a problem with the drain system as you describe, or by low water pressure to the machine (should be 15-25psi flow), or bad wire connection to this middle sensor.
Check for proper water pressure first (should be a gauge on the machine) during the fill. Then check / repair drain as needed. These will probably eliminate the problem