Size of Vacuum Hose???
Does anyone know the size of the vacuum hose on the heater fan control under the dash used on my F53 chassis 2008 Holiday Rambler? The hose appears to be about 1/8" ID, but I am not sure. I want to order a longer piece since there is almost no slack in the current hose. There are 2, 3, 4, 5mm hoses all available. Too many to just make a guess.
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