First dishwasher with water heat boost?When?

[mavei511]

Wanted to find out what was the first dishwasher made with a water temperature boost. Also I read that the first dishwasher was made with a heating element for drying in 1940. Who was it? Read that GE introduced its Calrod unit on its 1951 models.

 

[mixfinder]

Kitchenaid

In the early 60's Kitchenaid introduced the Sani-Cycle. Wasteking was touting Steam Powered washing. Most dishwashers ran hotter in the old days, because the water tanks were hotter and the there wasn't a way to turn off the heating element, so the temperatures soared during the drying cycle..
Kelly

 

[appnut]

Our 1958 or 1959 Wasdte King's final rinse was heated to 150+ degrees.

 

[tomturbomatic]

Well, there were the old Youngstown & Apex dishwashers that had an electric storage tank heater underneath the tank in the cabinet. Hotpoint dishwashers even in the 1940s, had a Calrod heater that ran during the whole cycle, but was used mostly for drying. It probably did not do much boosting of the water temperatures even by the early 50s when they devised the detergent dispenser that enabled the double wash feature, because the two washes were 5 minutes each and the rinses were one minute each. Beginning in 1958 or 1959, TOL Westinghouse dishwashers offered a booster heater which delayed the timer in the wash cycle. Since Westinghouse machines did not have a detergent dispenser that enabled a pre rinse until the early 60s, the machine filled for the wash after a short purge of the water line with only the inlet valve and the drain pump operating. The hot water hit the cool load and cooled quite a bit. The 600 watt heater used to boost the temp to 140F could add about an hour to the wash portion of the cycle as it heated the circulating water. If the machine was installed on an outside wall, winter temperatures would cause even more time to be added. The KitchenAid Superba in the 15 series offered Sani Rinse which was a one gallon fill for a third rinse which heated the water to between 155F & 160F during a pause while the pump was off, then began recirculating the water. Sears Kenmore and other D&M dishwashers in the early 60s began offering a high temp rinse option. The Heavy Wash cycle was just extended time, not a heating delay. Chambers, another D&M dishwasher offered high temp washing about the same time that the Sears machines did in the mid 60s. If the machine was the 120 volt model it could be set for 150F wash and rinse. If it was the 240 volt model, there was an option for, I think, a 180F second wash and 180F final rinse. That model was only offered briefly and these were not insulated tanks.

 

[bajaespuma]

I recall GE dishwasher Ads from the 1930's that boasted of the boost. I think that the earliest Hobarts had them as well; it wasn't uncommon for an automatic dishwashing machine to have an internal water heater. I think the heating element for drying came later. You don't needed a heated dry on machines that boost water temperatures to 180. Things dry immediately on unloading.

 

[Brent-Aucoin]

Very interesting Chat.
Tom your insight was so fun! I just love dishwashers!
What do you have in your collection? I know what I saw of yours when I was there for the wash-in at the warehouse.
I think you said your daily driver was a KDS-18.
Here is a question that I know you will have some thoughts on....
What are your views on the Kitchenaid Hobarts with the wonderful "Big Blue Wash-arm", VS. the "HydroSweep" wash system? I think they are both amazing. Why the change though from one to another, besides a bigger wash tub?
Thanks for this Post Thread. Great Idea.
Thanks for always sharing Tom!
Brent