Mount Range Hood

Mount Range Hood
How do you determine where water is coming from in a roof vented microwave and fix it?

I have a microwave to be mounted over a Range Hood and has a vent that exhausts thru the roof. I removed the old microwave but needed some items to install the new, so while the area sat empty, water began to occasionally drip down onto the stove below. A look in the attic revealed no apparent water and it seems to only drip on cold mornings, so possibly condensation?

I'm concerned that water will leak into the microwave blower motor and cause damage to it or worse.
I just bought the house and had a contractor work on the exhaust on the roof. Maybe this wasn't done properly, but it didn't drip down during several heavy rains, so I'm thinking that it isn't the roof pipe.

If you are in a cold region..... and with the vent open and the rush of heat unabated…… I would guess that it might be condensation.

36 STAINLESS STEEL WALL MOUNT RANGE HOOD FW 3515
36 STAINLESS STEEL WALL MOUNT RANGE HOOD FW 3515
Paypal   US $249.00
30 NEW WALL MOUNT GLASS KITCHEN RANGE HOOD VENT RH607
30 NEW WALL MOUNT GLASS KITCHEN RANGE HOOD VENT RH607
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30 WALL MOUNT STAINLESS STEEL KITCHEN RANGE HOOD RH618
30 WALL MOUNT STAINLESS STEEL KITCHEN RANGE HOOD RH618
Paypal   US $341.00
36 NEW WALL MOUNT GLASS KITCHEN RANGE HOOD VENT RH607
36 NEW WALL MOUNT GLASS KITCHEN RANGE HOOD VENT RH607
Paypal   US $352.00
36 WALL MOUNT STAINLESS STEEL KITCHEN RANGE HOOD RH618
36 WALL MOUNT STAINLESS STEEL KITCHEN RANGE HOOD RH618
Paypal   US $358.00
30 GLASS WALL MOUNT STAINLESS STEEL RANGE HOOD 198D 30
30 GLASS WALL MOUNT STAINLESS STEEL RANGE HOOD 198D 30
Paypal   US $349.00
36 GLASS WALL MOUNT STAINLESS STEEL RANGE HOOD 198D 36
36 GLASS WALL MOUNT STAINLESS STEEL RANGE HOOD 198D 36
Paypal   US $349.00
WALL MOUNT STAINLESS STEEL GLASS KITCHEN RANGE HOOD 30
WALL MOUNT STAINLESS STEEL GLASS KITCHEN RANGE HOOD 30
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48 WALL MOUNT STAINLESS STEEL RANGE HOOD T2 48
48 WALL MOUNT STAINLESS STEEL RANGE HOOD T2 48
Paypal   US $1,089.99
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