I am gettng ready to replace a 10k SHR10 Stoway unit with a new STH10 unit. My digital control will not go into program mode when turned on. Otherwise the unit seems to work fine as controls fan, temp, heat etc. Just slightly concerned that the digital unit will not go into program mode to modify or set up voltage etc on the new unit. Does this indicate an issue with the unit and should I not install the new STH10 until the issue with the digital controler is resolved?
Hi Howard…Thanks for posting~
Your SHR-10 was originally a unit built for 3 knob manual control so it must have been retrofitted to digital…
What model digital control do you have ???
If it is a Cruisair SMXII or SMXir then it's typically one of the buttons on the keypad that has failed, and thus does not allow you to access the program mode (or it's labeled function)…It could be the Off or Set button, or it could be any of the other buttons that you press Together to access the certain parameter you are trying to adjust…In which case you may need to replace the Keypad/Display, but not the board in the box at the other end of the cable.
Then again I may be misunderstanding this statement "My digital control will not go into program mode when turned on"
Are you expecting it to go thru something at power up ??…Not so with Cruisair controls, but some others do go thru a few display changes/messages.
Also: The STH units are for 3 knob manual control (no circuit board or box) so you would use your existing retrofit board/box.
If you want a unit ready for SMX (has box & board) it would be a STX unit…A new SMXII or SMXir keypad is an extra $225 retail.
I'm also not sure (you didn't say) if you already have the new unit ???
If so…Then all the parameters (like voltage to the box) will be retained in the retrofit box that exists…
There is also a factory reset to factory preset parameters that will work (providing those buttons are active) for any unit but are not the best as you might expect…
Fan speeds, low & high will be different (for the old unit) and not optimized for your installation & new style fan motor.
But nothing in the programming (if you have Cruisair controls) should hurt or stop you from running the new unit on the old control until you get one that you can program…
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