Heats up water slowly, only by repeated operation

Check the inlet screen to the water circulating pump and the water heater element for lime buildup. I've seen a heater element that had a 1/4" thick layer of lime encasing it. The inlet also had some lime and other debris clogging the screen. After carefully chipping away as much as was practical and running lime remover (such as CLR) through the machine, it heated the water much more quickly and had an effective spray.

To prevent a recurrence of this problem, make sure you have a functional water softener ahead of the water heater feeding the machine.

Cold fill is more efficient in energy usage apparently and makes your dishwasher able to have the A+ sticker on it. There is a heating element inside the unit or in the bottom of the washing hole depending on age of the washer that heats everything up

Sounds like you have it connected to hot water supply. This is a cold water fill only machine.

your heating coil has gone bad it`s that rod looking thing in the bottom of your unit under your spray washing spinner depending on the age of your unit your probley better off buying a new dishwasher

a regular wash should take about an hour and a half. plus wash would be longer only because it heats the wash temp hotter.
wash temp is generally around 140 degrees
and your rinse is around 161 degrees.

your flow through heat assembly heats the water at 2 degrees a minute. so it can take anywhere from and hour and a half to two hours for a full cycle.
try turning your sink on hot water until you feel hot water coming out then start the dishwasher so it doesnt have to heat cold water up to those temps. it should run a little shorter.

The drying coil that is broken also heats the water during the wash and rinsing phase. Right now it is waiting for the water to heat up, that's why it's pausing. Replace broken heater, they are relatively cheap and can be gotten at repair clinic.com.

Hi, I think you will find that the heating cycle has failed! Does the water heat up? If not check the heater and the thermostat if you have one. No heat No wash cycle..!
Get back to me......

indicates that the heating element in the unit is non operational ( not connected or burnt out )

Check the cold water line into the unit. Remove the hose from the washer and clean the screen. flush the line while it is disconnected into a bucket or small garbage can. Your washer wont advance without a fill and most fills/rinses are with cold water

This unit is a sanitizer, not a full fledged dishwasher. It is designed for restaurants and bars where the primary use is washing glassware. The behavior you describe is normal for this model. The manual can be found at the following link:
https://feg.hobartcorp.com/resourcecenter/ProductDocumentation/F34779%20Rev%20B.PDF