On Wednesday, December 17, 2014 4:01:48 AM UTC-5, wrote:
On Tue, 16 Dec 2014 05:26:41 -0800 (PST), trader_4
wrote:

I agree. They can clean the ducts, but even they aren't going to get
inside most of the air handler of the furnace. Just because the WH was
leaking, if there is no damage around the WH, no mold visible, etc,
that wouldn't make me worry about the furnace ducts.
If he's worried, how about taking some grills, registers off and taking
a look? Any evidence of mold or abnormal dust in the filters, in the
easily visible part of the blower compartment?

And if there is a problem, I doubt the lysol approach is going to do much
to solve it. I'd also be concerned about choking off almost the whole system
and trying to run the blower.

I woundn't even consider that Lysol, that odor might never go away.

On the other hand, why not wipe out the furnace. When I moved into my
house, the furnace area around the blower was filthy. I bucket of
water, sponge and a little dish soap cleaned it really nice in a half
hour. On my case, I removed the blower, took it outdoors and hosed it
out. I did nothing with the ducts except vacuum inside each register.
Most what I found was small parts of kids toys, and a few coins.

I doubt that with most furnaces today you could remove the blower, hose
it out and put it back together in half an hour. And it seems fairly
pointless anyway. All you're getting at is a small part of the furnace,
none of the duct system. Even in the furnace, there is a lot more than
the blower. The heat exchanger is usually totally inaccessible