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Hot water supply for hot and cold fill machines

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I bought this whirlpool machine a couple of weeks ago: 3LWTW4705FW 

It’s hot and cold supply. The appliance specialist who sold me it told me to arrange a hot supply. I did that but it’s off a small electric water heater used for a sink. He fitted the machine. Now there’s an issue with the capacity of the heater as I could smell burning plastic. 

Is there any way of telling how big a heater you need to run the machine? The manual isn’t helpful other than pressure figures. Also, could a Y piece be used to make the two inlets use cold supply? I’ve read that this works in other machines.


thank you!


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  • Root Admin

Hello there. You do not need a hot water supply to run a hot and cold washing machine. Obviously it is designed to use hot water, so ideally yes you should have a hot water supply. But my article here explains how you can happily use such a washing machine with just one cold water supply Washing machine is a hot and cold fill, but I only have a cold water supply

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