At 22:49 12/12/97 -0800, Mark McCulley wrote:

>>One thing about our heater--and it's been this way from the start--is
that

>>when the heater turns off (either because the thermostat tells it the

>>interior is warm enough, or the heater is manually turned off) *both*
the

>>"flame" and the blower fan turn off immediately.  This strikes me as
wrong,

>>as I would have thought that the fan should run for a bit (with
"flame"

>>off) to cool the heater down.  As it is, if the fan is turned on
manually

>>(at the heater control panel), hot air blasts out for a good 30 seconds
to

>>a minute before blowing only cool air.

>

>This is exactly how mine works as well though sometimes the fan comes
back on

>and blows for a while after being off for a minute or two. It's
certainly

>not as

>efficient as it could be, but I think this is how it's supposed to
work.

>The newer

>models have a more intelligent fan control that varies the fan speed
according

>to how much heat is being produced.

>

>>Recently, it has been turning itself off with increasing frequency.
The

>>panel will still indicate that the system is on, but no fan, no heat.
If

>>one turns the fan on (i.e., "fan" not "heat") manually, hot air will
come

>>out if the system turned itself off only a short time before.   If I
try

>>this immediately after a spontaneous shut down *very* hot air comes
out.

>

>Is your thermostat working? When the heater spontaneously shuts down

>can you get it to come back on by adjusting the thermostat? You say
that

>the panel will still indicate that the system is on--are you talking
about

>the red light that indicates the rocker switch is in the "on" position
or

>the green light that indicates that the burner is on?

>

>>But I'm just guessing, since I don't have a wiring diagram.  And even
if I

>>were right, I'm not about to get in there messing with it without
a...

>>well... wiring diagram.

>

>The only wiring diagram that came with my unit was a simple diagram

>indicating how to connect the thermostat and power supply. I can get
you

>a copy if you want but I doubt it will be of much help. There is no

>information included on how things are wired internally.

>

>-Mark McCulley

>

>

<bold>Propex

</bold>Phone: 011-44-1703-528555

Fax:   011-44-1703-528800

Rick