Verify that the thermostat is switched to cool mode and has a cooling set point below the room temperature reading.

Honeywell thermostat won't go below 70. So before i tell you the stat has failed lets check a few things. Check the door of the furnace. Inspect the ac coils for dirt.

It won't hurt nothing setting the temperature lower than 68. It will either cool it down say to 66 or what ever or it won't. One of the most common causes of a thermostat not reaching the set temperature is a damaged or broken sensor.

If your thermostat falls under the honeywell 4000 series,. Push the battery door open. Test system by increasing the temperature.

It might be a factory default that does not allow you to turn the ac lower than 69 and you have to go into the. Check the furnace door and its power switch. Then, take a look at the steps below to reset your thermostat to the default settings.

Test the system by lowering the temperature. When a sensor is the issue, the. Apart from the temperature limiter, there are a few other things that could prevent your thermostat from going below a temperature.

While there are many different types of thermostats out there, a honeywell thermostat is among the most popular. Your honeywell t5, t5+, or t6 thermostat is now. I'm sure on a real hot day it will not but on a day.