The heater controls are inoperable when this happens, its as if the outer limits took control of the heat and it gets extremely hot. I cant turn the heat on or off there is no digital display. After so much time passes by the outer limits turns control of my heat back over to me, and I have a display that registers the temperature again.I did disconnect the cluster one time and it still blew hot air by itself. So I reconnected it and did have some measure of control. What can I do?
Check the electrical connector. If you unplug it and plug it back in and it works for a few days or weeks, there may be a light film of corrosion on the pins. The scratching action of plugging it back in will often grind through that corrosion. If you can make the display turn on and off by wiggling the plug, suspect broken solder connections on the circuit board inside. That's been a real common problem with tvs for decades and it can affect anything that was machine-soldered during assembly.
If you can't do anything to affect it, search for a replacement at one of the pick-your-own-parts salvage yards. If you live anywhere near Ohio and southern Georgia, there's a real nice chain of two dozen yards called "Pull-A-Part". Parts are very inexpensive so it won't cost much to buy one for testing. You can do an internet search to see how many of your model they have in each yard but they can't tell you options, colors, and which parts have already been removed.