Tuesday, April 15, 2014

Review of Honeywell RTH6350 5-2 Programmable Thermostat

Honeywell RTH6350 5-2 Programmable Thermostat
Customer Ratings: 4.5 stars
List Price: $59.99
Sale Price: $42.96
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I had this installed in a matter of minutes after receiving it. It comes pre-programed but the times and temps were not to my liking so I programed it and had it drop the two middle times so mine just has wake and sleep. Programing literally could not be easier. I don't know why there are so many reviewers having trouble with the light-up display, mine is very bright. Simply press the temp up or down button momentarily and the backlight comes on and this does not raise or lower the temp, you would have to touch the temp button again to make a change. The unit looks good too, much better than the Robertshaw from 1988 that it replaced. The unit really does keep the temperature right where you set it too but this may not be such a good thing. The Robertshaw unit was set for 77 degrees and would not come on until the temp reached 78. It would lower the temp to 76 then shut the A/C off. The Honeywell unit is also set for 77 degrees but instead of a 2 degree spread it has a +/1 degree accuracy which means you never see it move off of 77 degrees. The problem is that while it keeps the temp right where you want it, it makes your equipment work twice as hard to maintain this kind of accuracy. I've been working in my office right next to the A/C closet ever since I installed it several hours ago and have been keeping a log of start/stop times just to see how it's doing and on average the A/C has been running 8 minutes and resting for 12 minutes all day. This is much more than the Robertshaw unit that had less accuracy and I really don't notice the difference. The problem is that all this extra stopping and starting can't be good for the equipment and I would imagine that it will use more electricity, once the blower motor is up to speed it doesn't take much to keep it going but you can see the lights dim when it starts so you know all those extra starts are using more "juice". I still like this thermostat though, and have given it 5 stars. I just wish Honeywell would have put one more code entry screen in the programing of this unit that would allow the user to put more of a spread between the on and off temps to save wear and tear on the equipment.

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The packaging and website both claim that the 6350D has auto changeover from heating to cooling. However, that is NOT the case. If you need this feature, buy the 6450 instead. On my second call to their support 800 number the representative informed me of this and offered a trade in by mail. My other little gripe which required my first call to them, is that although installation was quick, their diagrams did not include one that matched my wiring. The good thing is that they were knowledgeable and quick, and their phone menu system didn't take all day to navigate through.

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To address Mr. Dave's concern about the battery...

I've been using battery powered thermostats for over 15 years and my experience has been that the batteries will last for years. This is my first Honeywell so I can't comment on the exact amount of time the battery will last, but if you change the battery once every year as suggested in the instructions, you will never have a problem. Also, two months prior to battery depletion, this unit will flash a warning to replace the battery. However, I agree with Dave that a hard wired (power) system is better from a safety perspective. Honeywell sells models that do that too. Still, there is also the possibility that the furnace could fail while you're away and there are (freeze alarm dialers)devices that can call you in your winter home and inform you about that condition.

I also agree with Dave about the length of time the back light stays lit.

Other than that, I really like the unit. It's simple to program and use, and the display is very easy to see. Also, it doesn't overshoot the temperature like some other units I have used.

I highly recommend this thermostat.

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This programmable thermostat is generally a good one -does what you need it to do. But there will come a day that you see an "In Recovery" message and wonder if it has robbed the liquor cabinet! This model has "Smart Response" setting that I found to be quite annoying. What happens is the thermostat attempts to calculate the amount of time it will take to reach the temperature at the next time setting. So if you want 69 degrees at 7:00 and your room is 61 degrees, the heating system will turn on long before 7:00 such that the room reaches 69 at that time. Well, seems interesting -but you might find your furnace on full blast at 5:45 instead of 7:00. The mode will read: "In Recovery"

There is a way to turn off this feature but you won't find instructions about this in the Operating Manual. Quite oddl;y the advanced instructions are in the "Quick Installation Guide"! User friendly? I guess that is a matter of personal opinion.

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The box clearly states that the product will auto change from heat to cool. It does not. Honeywell needs to change their packaging.

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