Clothes Dreyer Venting Dangers?

> The hired painting crew got through doing the outside of our home a
> couple of days ago and while I was admiring the improved look of the
> place I noticed that our clothes dryer's through the wall vent had been
> painted with siding paint.
> While it blended in and looked better than if they'd left it in its
> native off-white plastic color, I wondered if its louvers were still free=

> I grabbed a ladder and took a look. Sure enough, all three of its
> louvers were stuck in the closed position. It took me a few minutes with
> a putty knife to break them free and scrape off some dried paint ridges
> so the louvers were all flapping free as birds again.
> That got me thinking about the often repeated warnings about the dangers
> of glogged clothes dryer vents and what can happen as a result.
> I'd expect that a clogged vent on a gas fired dryer could cause gas
> combustion products to be released into the inside of the home, which
> doesn't sound like something you'd want to have happen.
> Assuming an electric or a gas dryer, what "catches fire" and where, when
> the vent gets blocked with lint?
> Do any dryer manufacturers equip their appliances with air flow or back
> pressure sensors to prevent them from running if the venting system
> becomes blocked?
> My curious mind wants to know.
> In our case I've got about the most direct outside venting possible, the
> vent goes through an outside wall behind our electric clothes dryer and
> is lined right up with the dryer's outlet port. A ten inch long length
> of corrugated aluminum flex connects the dryer to the vent which lets me
> move the dryer out enough to disconnect it when needed. A couple of
> blocks of wood screwed to the flook on each side of the dryer keeps its
> outlet from moving out of line with the vent.
> Jeff
> --
> Jeffry Wisnia
> (W1BSV + Brass Rat '57 EE)
> The speed of light is 1.8*10e12 furlongs per fortnight.

>There are number of overtemp sensors in both gas and electric dryers
>to prevent this.

>
> The hired painting crew got through doing the outside of our home a
> couple of days ago and while I was admiring the improved look of the
> place I noticed that our clothes dryer's through the wall vent had been
> painted with siding paint.
>
> While it blended in and looked better than if they'd left it in its
> native off-white plastic color, I wondered if its louvers were still free.
>
> I grabbed a ladder and took a look. Sure enough, all three of its
> louvers were stuck in the closed position. It took me a few minutes with
> a putty knife to break them free and scrape off some dried paint ridges
> so the louvers were all flapping free as birds again.
>
> That got me thinking about the often repeated warnings about the dangers
> of glogged clothes dryer vents and what can happen as a result.
>
> I'd expect that a clogged vent on a gas fired dryer could cause gas
> combustion products to be released into the inside of the home, which
> doesn't sound like something you'd want to have happen.
>
> Assuming an electric or a gas dryer, what "catches fire" and where, when
> the vent gets blocked with lint?
>
> Do any dryer manufacturers equip their appliances with air flow or back
> pressure sensors to prevent them from running if the venting system
> becomes blocked?
>
> My curious mind wants to know.
>
> In our case I've got about the most direct outside venting possible, the
> vent goes through an outside wall behind our electric clothes dryer and
> is lined right up with the dryer's outlet port. A ten inch long length
> of corrugated aluminum flex connects the dryer to the vent which lets me
> move the dryer out enough to disconnect it when needed. A couple of
> blocks of wood screwed to the flook on each side of the dryer keeps its
> outlet from moving out of line with the vent.
>
> Jeff
>
> --
> Jeffry Wisnia
> (W1BSV + Brass Rat '57 EE)
> The speed of light is 1.8*10e12 furlongs per fortnight.