T&T: Cruisair Runaway

[Steve -Comcast]

Stephen Offutt wrote:
> One of my two 16K BTU Cruisair A/C units, with a SMX  (large panel) Control,
> will not shut down (the compressor) when the thermostat-set temperature is
> reached.  When the 'OFF' button is pressed; I hear the compressor stop, but
> I can hear something still running.
>
>   
What's running?
Pump
Blower
Reversing valve
>  
>
> The only way to shut it down is by throwing the circuit breaker.  This is a
> new (two-day-old) problem.  The unit is about two years old - according to
> the PO.
>
>  
>
> This is a single footprint design; with the compressor and evaporator
> together.  They seem to be otherwise functioning normally. Both units were
> serviced eight months ago.  The forward unit is functioning quite well.
>
>  
>
> I verified that the unit would not stop at the preset temperature by running
> it in 'HEAT' mode to 6deg above a SET temperature (68deg); then running it
> in 'COOL' to 4deg below the SET temperature before throwing the circuit
> breaker (temperatures are stated in Fahrenheit).
>
>  
>
> I reset the SMX to factory defaults, and the problem persists.  I removed
> and cleaned the filter.
>
>  
>   
Does the temp readout seem correct?

If you shut down by interrupting the power, when you restore power does 
it start running again, or does it wait for a call for heat/cool?

Steve Sipe
Solo 4303 "Maerin"