40 is 40% humidity in room - that's really dry.
For moist area you usually want 50 or 60%.
Dehumidifiers are for damp areas. If temp ouside is below freezing, inside house is probably already too low.
Keep your old dehumidifier. If it doesen't work get it fixed, it's a better machine than the new ones and most likely made in the states and can be repaired. Adjustments are made with a Min. Max.dial not % moisture settings.
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