Where can I purchase a new Rival space heater, model T620, 1500 watt, HQ300-767-3?

odd as you might think we did not sell you a skillet so why would we replace it for you .

Generally no as the wattage is too great. you would need one specially made fro a heater that exceeds the number of watts that the heater is rated at. If it is this one, it is 1,500 watts

https://www.lowes.ca/product/electric-space-heaters/profusion-heat-quartz-radiant-compact-personal-electric-space-heater-402421

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Did you try the rotom book, through altemp

Water Filters Lawn Garden Appliance Parts

Hi,

Check out this tips that I wrote about space heater problems..

DeLonghi Space Heater does not Heat

heatman101

Heh, I just went searching for mine because it was getting cold. The left knob is (from left to right) Hi, Lo, and Fan Only. The right knob goes from Off on the bottom left to Hi on the right. It doesn't click or anything, since it's the one controlling how hot you want it to be.

No I never had any luck and the parts likely 1/2 the cost or more of a new one at wal mart and the heat element would still be old too

I could find no electrical code or mechanical code that says you can do that, so I wouldn't do that.
But have you thought of or do you have the overhead space to install a hanging unit heater? They don't require much space(just make sure you install it per manufacturers specifications) and they come in much higher BTU ratings.

Just disconnect the other thermostat. You can leave it there just disconnet the wires