Top 20 Hobart Mixer Only, Planetary, Bench, 12 Qt., HL120BUILDUP - Page 8 Questions & Answers

EE : booster did Not reach temperature within 8 minutes after initial fill.

after reaching a pre-set number of wash cycle ( default 2500) Hygiene (HYG) indicator will pop out.

If you see F04, it is likely that there is water inside the air trap or pressure transmitter for wash tank is faulty. Sometimes it happened due to water inside pressure pipe.

Instructions https://my.hobartcorp.com/resourcecenter/ProductDocumentation/F17791%20RvO%20(02-06).pdf Parts https://my.hobartcorp.com/resourcecenter/ProductDocumentation/F17964%20Rev%20E.PDF ctncas

Check power to the motor contactor, If you get power out to the motor, then the motor is bad

http://www.partstown.com/hobart/hob00-328994

http://www.hobartcorp.com/products/commercial-dishwashers

more than probable if the solenoid for the water exit control is not functioning the water will drain past and lower the level in the machine get a technician to get a proper diagnosis and a quote to fix.

Yes, P2 is failure on rinse temp sensor.

Google it and also try ebay.

It seems to have failure on the lever sensor . check the float , probe and switch assy.

Did you check the circuit breaker on your fuse panel?

That's true. excess of foam can cause poor wash pressure and poor final rinse. Operation manual , pag.24. (F17791Rv02-06.pdf) DO NOT exceed chemical manufacturer's recommended concentrations for detergent, sanitizer, rinse aid or lime scale remover.

For a machine without a break-tank (a.k.a. cistern) and booster pump: check the inline debris strainer on the rinse water pipework; check you're not missing any rinse jets; check the inlet valve is fully opening. For a boosted machine, check the pump impeller isn't disintegrating; check that the flexible hoses to the booster pump aren't collapsing internally. For both machines: descale if you're in a hard water area.

I found this website that can help you further. Hobart Kitchen Appliance Product Support ManualsOnline com

One of the temperature probes has failed.

This is a "boilerplate" answer for the problem of over-sudsing. The reason you know this is a generic statement is that they have no way of knowing the contents of the presoaks, sanitizers, and soaps that you use. It is their way of saying "Until you are sure that you have ruled out all other possibilities of the problem, it's not OUR problem yet". When I was a dishwasher they told us we needed to basically "prewash" all the dishes before running them through the dishwasher, otherwise you will find that you have to drain and refill more often and will use more soap and such. Only problem was, "prewashing" was so time consuming that we were losing more money doing it that by draining and refilling the machine each shift. We still rinsed them with the sprayer before loading, but the heck with the pre-wash....that's why you bought the $#$^*^ dushwasher, right?

That water pressure is fairly marginal for a machine without a booster pump. I'd be looking to cleanout the debris strainer in the water supply: you may have a separate strainer, it may be at the inlet side of the water valve, it may be in the form of a mesh at either end of the fill hose. If your water is hard, there may be a restriction formed by limescale at the boiler outlet.

When I did commerical Hobart repair, this usually was a timer issue..on this model is it a digital timer or a manual dial timer that you turn to select cycles? Another thing is..some dishwashers water temp has to be a certian temp before timer will advance.

Usually when calls come in with this type of complaint, the technicians always have to pull out the dishwasher from its installation and disassemble the lower spray arm section to check for debris in the pump and motor or the sump depending on which brand and model you have. It usually turns out to be quite a job and routinely brings in a labor cost of at least $125.00. If your going to try and diagnose this your self you will want help. Most manufacturers have a technical assistane line. You should have an 800 number on the model serial tag of your dishwasher that you can call and see it they can get you to that department. You can also try sites like repairclinic.com....Good luck