I recently purchased a GE stacked washer dryer model (GTUP270EMWW). To my surprise (and horror) it does not have an end of cycle signal for the dryer. Frankly, it never occurred to me that a dryer would not have one. Does anyone know if there is any way to add such a signal? (A timer would not work well since our dryer loads vary a lot in size.)

I'm off to give this model negative five hundred stars on every rating site I can find :-((

Sure you could add one but you will need a relay, wiring, end of cycle timer signal, and know how to wire it. Basically you need a double pole relay that is kept open by the dryer ON power. When the timer shuts the dryer off, the relay closes and the end of cycle signal is energized. You may find an upgraded model that has this function and you might be able to buy the parts from the factory and add one. Most likely it would be a plug in off the timer.

That sounds like a good idea after the warrantee period expires. I'll see if there is anything on the wiring diagram that might be a place for a plug in. For right now, I was wondering about some kind of after market device that might monitor the spinning or exhaust temperature.

Not that I/m aware of. I'd probably just use a kitchen timer for starts.

You should be able to find a terminal on the timer that energizes when it reaches the end of the cycle because these timers are used in many different models that have all kinds of features. All you need to do is add a buzzer that is 220 volts or get a transformer and a buzzer to match the output. I am sure if it was my dryer I could find a way using a meter in a few minutes. DrTom4444