I have a fridgidaire residential refrigerator and I was worried about how to winterize it. it is stored in a rv lot without power so the concept of running the ice maker for several cycles to make pink ice won't work. I bought a dummy filter (the hollow canister) and put it in. then hooked up air and operated the water dispenser on the door until it was blowing air (ie all water out). then pumped rv antifreeze into the lines and again operated the water dispenser until it was outputting antifreeze. there may still be some water in the ice maker as I cannot find a way to open its valve to push any remaining water out. but I made it through last winter ok so we'll do the same this year.
I read a post somewhere about a guy that wired a remote switch to the ice maker solenoid so that he could close the remote switch and open the ice maker water solenoid is order to pump antifreeze through it also. but that requires removing the refrigerator to get to its innards and then putting it back. not the job for the casual rv owner.
there is a small valve to shut off water to the refrigerator but it is buried and not easy to get to. some people close it to keep the antifreeze from going into the refrigerator and contaminating the water filter. but the dummy filter canister solves that problem. in spring just flush the antifreeze out the same as all the other faucets. let the ice maker run a few cycles to flush out any antifreeze that may have seeped into its water supply line.
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2015 cardinal model 3825fl
2015 dodge ram 3500 dually
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