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Thermostat is following a schedule when none is set

I have a Lennox L5711U thermostat. I have never had a schedule programmed, like to be able to turn it up and down manually. Some how it is now set to "follow a schedule" and turns the temperature up to 70 when it hits the "scheduled" time. The only way to override it is to set the "hold" time until a certain time and then the thermostate goes back to following schedule the temperate goes back to 70. Tried changing batteries, no change. Thanks,

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Your Lennox thermostat could be defective, but it may have been programmed by some inadvertent button pushing. The thermostat also has certain default settings such as a low limit that will trigger heating if the indoor temperature becomes too low (to prevent freezing of pipes).

Posted on Feb 09, 2014


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SOURCE: why will my programmable honeywell thermostat not keep changes to my schedule

Could be batteries need replacement

Posted on Apr 28, 2013

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Why does my Honeywell thermostat state temporarily set at 68 degrees? A few days later, it will be set at 62 degrees without anyone touching the thermostat?

It's a programmable thermostat. When you change the temperature, it will say temporary until the next programmed schedule starts or a set amount of time. You will have to program the thermostat to the correct temp settings you wish to have, or you can push "HOLD" after changing the temp to make it stay at that set point. Hope this helps!

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Does a y2081 lennox thermostat have a batteryin it

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Link to manual..

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Thermostat says Heat On, but furnace is not running

Hi Juliegeee. I am Roger. I am going to download you a programming sequence I put together that will probably help. To test and see if it is the thermostat before reading all that I wrote hear, Jump or touch the two wires together on the thermostat and see if your furnace starts and stays running. If it does, this post I made will help you to get it going. There are many manufacturers making many different digital thermostats. With residential thermostats, the variations of types, methods of operation and how to program them has gone far past the market need to just plain crazy. The only reliable place (?) to get specific operations and program manuals for your particular product, would be from "customer support" at the "manufacturers" web site or phone number. The "Model", "Serial" and "Product" numbers of your particular thermostat are usually printed on a small piece of paper pasted in its cover somewhere. In most cases, Just the Name and model on the outside cover will be enough for identification when asking a question or ordering an owners manual. That said, here are a couple things that seem to be fairly standard. This is the best way I found to program over the years. Remove the thermostat from its base plate. Be careful pulling on it. They don't all come off the same way and we don't want to break it. Before starting the programming process, it's best to erase whatever may be in your thermostat already. Overlapping time periods can cause a lot of trouble. Removing the battery's will erase any programming that may have been done before now. The factory program is just for basic operation and they don't normally have any schedules in them. The factory program will not be affected by removing the battery's. It's also much easier to do all this while sitting at a table and not hunched over at the wall. Remove the old battery's and replace them with new ones. The battery's are used to store your programming so be sure to put good battery's back in before starting. Here are some common terms used in programming a thermostat. If the names I am using for these procedures is different in your thermostat, change them when writing this all down. One "SCHEDULE" covers a 24 hour block of time. Each block of time from a start time to a stop time is a "PERIOD" in the "SCHEDULE". Again, these are the most common terms and may very in your thermostat. Here is an example of how to program one complete "SCHEDULE" ----- Get a large piece of paper and write down EXACTLY what you want your thermostat to do in ONE, 24 hour day. Here is an example of one "SCHEDULE" having 4 time "PERIODS". > ----- You want your furnace to start at 5:00 AM and warm the house to 72 degrees by 5;30 when you get up. Write down "72 degrees from "5;00 AM to 6;30 AM, or when you expect to leave the house. Then write down "62 degrees from 6;30 AM to 4;00 PM or 30 minutes before you expect to be home. Then write down "72 degrees from "4;00 PM to 10;30 PM or when you expect to go to bed. Then write "62 degrees from "10;30 PM to 5;00 AM or 30 minutes before you expect to get up.-----< You have just covered a 24 hour period of time and created ONE "SCHEDULE". Each day of the week needs a schedule. Various thermostats are different in how they handle schedules. You will need to read your "Owners Manual" to find out how your thermostat arranges its schedules. To get started, look for a "SET" button or touch sensitive area on the display screen. If there is no SET button you can see, check your manual for the button to press. That will put your thermostat in its programming mode. With some thermostats, the display will blink or change color to let you know you are programming. While in this mode, use the temperature set point arrows ( up and down) to scroll through all the different things that can be set ( Programmed ). When you hit one you are looking for, press the left and right arrows or buttons to set that function or time where you want it. Press the up and down arrows to get to the next adjustment, use the left and right arrows or buttons as before to set that function. Keep doing this until you have gone through all the various functions and set points. When you have gone all the way through, and have all the functions set where you want them, DOUBLE CHECK all your times and temperature changes against the desired operation you wrote down. Be extra careful none of your start and stop times for the temperature resets overlap each other. If you programmed in Holidays or special events you may have, be sure the TIME and DATE are correct. Press the "RUN" or "START" button to lock it all in and start your programs running. Again, be careful of overlapping the times in each "PERIOD" of each "SCHEDULE". That can keep your system running all the time or maybe even not at all. I hope all this will help you to better understand these complicated devices called thermostats. Thermostats are a deep subject and specific factory information in your owners manual may be needed to get you through. I hope this helps though. At least a little. Write it down before starting and be extra careful of overlapping in the time "PERIODS" and you should be OK. Good Luck, and let me know if you need more help. Roger

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Mystery message "wait" appears above "following schedule" display line on our Th8000. Ac does not come on even when temperature is in range. Fan operates ok. Is "wait" setting one I can reset? Maybe a...

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sounds like it is in smart recovery mode check installer set up

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