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Return is one of the time period settings. Other typical periods are WAKE, LEAVE & SLEEP. So you'd set leave to the time you leave the house to go to work for example and return is when you get back. If you want specifics (or the manual) on how to program your unit I need the model number.
It wouldn't flash RETURN when it's in the return period. The only temporary setting I know of is a temporary HOLD. If you set the RETURN time to 4:30 and it comes on (says return) at 2:30 then the thermostat is defective and needs to be replaced unless you can live with that discrepancy. A work around might be to program the return time a couple hours later and if the discrepancy holds true then it will come on when you wanted it to.
I don't know what you mean by "I also have the issue of the temp setting not being able to override the programming that just happened." Your only override option is a temp or "permanent" HOLD aside from reprogramming. Give me a few and I'll see if I can find your manual
Here's your manualhttp://www.honeywellstore.com/store/images/pdf/rth2410b1001-u-5-1-1-day-programmable-thermostat.pdf
I don't have any more info than what's in the manual. I'm going to open this up to my colleagues so one of them can help. Please don't respond (even to acknowledge this post)until you get a response from us. If you respond first it will only delay your answer.
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