94pt 'cool o matic' gally exhaust fan

[Don Bradner]

Wal-Mart carries many Hunter thermostats, so look at them closely, as many would
not be suitable for the purpose. The 42999B may be the only one, in fact.

On 10/1/2008 at 9:31 AM Pete Masterson wrote:

>Good info!! Just what I needed to know. If I can find a Walmart in
>this state, I'll take a look at the Hunter thermostat.
>
>Pete Masterson
>'95 Blue Bird Wanderlodge WBDA 42
>aeonix1@...
>On the road near Scranton, PA
>
>
>
>On Sep 30, 2008, at 9:56 PM, Don Bradner wrote:
>
>> Mine also has Green, Brown, and White. Green-to-white turns the
>> Kool-o-matic on, Brown to white is the heater.
>>
>> I replaced with a Hunter 42999B from Wal-Mart, digital. Green to
>> the G terminal, Brown to W, White to Rh, with a jumper from Rh to
>> Rc. Y has no connection.
>>
>> Works very, very well.
>>
>> Don Bradner
>> 90 PT40 "Blue Thunder"
>> Posting today by satellite near Rodanthe, on the NC Outer Banks
>> My location: http://www.bbirdmaps.com/user2.cfm?user=1
>>
>> On 9/30/2008 at 4:47 PM Pete Masterson wrote:
>>
>>> I checked all the fuses in the overhead (it's different on a PT-42)
>>> power center and didn't find any blown fuses/tripped breakers.
>>>
>>> After disassembling a few things, I'm suspecting that the thermostat
>>> is shot. There's a lot of corrosion on the back side, down where the
>>> switches are mounted.
>>>
>>> I'm aware of how to turn on the fan, so that's not the problem. I
>>> previously had intermittent operation (that is, the fan would cycle
>>> on and off -- without regard to the thermostat setting -- but then it
>>> seemed to (mostly) be working as expected for several months. Last
>>> Friday, it refused to go on despite whatever manipulation. In the
>>> past, when the fan failed to come on, slamming the front door often
>>> started it up -- but even that doesn't work now.
>>>
>>> I took some things apart and found no 'juice' at the fan.
>>>
>>> The thermostat has 3 wires coming it its backside, white, green, and
>>> brown. Shorting either the green or brown to the white (presumably
>>> ground) causes the toe-heater to come on. (This was with the middle
>>> part of the thermostat removed, so the switches weren't active.) How
>>> the thermostat circuits work is a mystery to me.
>>>
>>> I'm going to try to find a replacement thermostat at a home center
>>> (although, we're heading into Amish country in a couple of days, so
>>> finding a home center with anything but lanterns might prove
>>> difficult...)
>>>
>>>
>>> Pete Masterson
>>> '95 Blue Bird Wanderlodge WBDA 42
>>> aeonix1@...
>>> On the road near Scranton, PA
>>>
>>>
>>>
>>> On Sep 30, 2008, at 3:35 PM, Gregory OConnor wrote:
>>>
>>>> Kool o matic fan fuse on 94pt is
>>>> front overhead component panel circuit block A "sk5"
>>>> above driver ,in cabinet block close to street side,
>>>>
>>>> to turn on the fan you need to play wit the center thermostat
>>>> try puttining one switch to cool and the fan on auto with the
>>>> thermostat on a low temp setting. to have it run on auto you need to
>>>> pick cool I guess it keeps from exhaustinng generated heat.
>>>> Greg94pt
>>>>
>>>
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