I have a honeywell thermostat model#th6110d1005 and it wont go below 68 degrees how can i removed the lock

It may be time for a new thermostat.

what is your thermostat model so i can give you the exact steps, but for now you can try out the best troubleshooting method out there...
take your thermostat off from your wall or where it is, locate the ppower cables and try to disconnect the cable, and just leave the thermostat for 15 minutes, after that reconnect the power cable and try it again..
good luck!!!

Not possible with that unit. Just buy a thermostat locking cover.

Here's a manual for your unit. https://customer.honeywell.com/resources/techlit/TechLitDocuments/69-0000s/69-0690.pdf Here's another link to trouble shoot your problem. http://archives.hvacmechanic.com/archives/228

Sounds like a bad tstat

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

What is the thermostat controlling?

Press and hold the up arrow and fan buttons until the display changes. Then press Next until you see 14 in the display. Change this value to 1 (with the up and down arrows) to get Celsius. (O is Fahrenheit.) Press Done to exit and save the setting.

The manual is available here: http://customer.honeywell.com/Honeywell/ProductInfo.aspx/TH6110D1005 . Scroll to the bottom and choose a manual then press Download. This particular section is in the Installer's Guide.

I hope this helps.

Cindy Wells

Here is a simple way to tell. Remove your thermostat from it's mounting plate, locate the wiring, the red and white are low voltage control wires. Disconnect them from the base and join the two together if the furnace runs you need a thermostat if not it is in the controls to the furnace.

Here what I have, Hope this helps.
http://customer.honeywell.com/techlit/pdf/PackedLit/69-2381ES.pdf

I have a Honeywell Programmable Thermostat, T8011R. The users guide for the T8000 series can be found at:
http://www.honeywell.com.au/business/acs/acp/ecc/ec/residential/identify.html

To keep your temperature at a single setting, just enter the temperature at every period, i.e. WAKE, LEAVE, RETURN AND SLEEP for both the Monday through Friday time frame and the same for the weekend. I do this at 55 degrees when I'm going to be out of town.
To 'Guest' , enter your 68 degrees at WAKE, LEAVE and RETURN, then enter 66 degrees at SLEEP. Do this for the Monday through Friday time frame and again for the Saturday - Sunday time frame.