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T8411r1127 digital thermostat for my a/c just quit- no read out or display we checked for a battery and did not see on

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Digital carrier thermostat reading P- on display. Any idea what this means


Some thermostats run on their own batteries, but some need power from the furnace to display, check this first. "P" may mean power.

Nov 22, 2016 | Carrier Heating & Cooling

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The display on one of our thermostats became difficult to read all of a sudden, as if the display is going out. When the display is pressed on it is slightly easier to read but not completely. What is the...


Many of these type of thermostats have a power back up. The batteries are two AA and can be replaced. I would expect to see a small rectangle on the screen near the center just left of the large temperature reading. Empty or just one bar is an indication that the batteries are dead.

The batteries are removed from the top.

Nov 24, 2015 | Emerson 1F80-0471 Blue Single Stage...

1 Answer

Honeywell thermostat is locked in the off position


sounds like keypad is programmed in lock position read manual for set up to activate keypad again.

Nov 25, 2012 | Honeywell Programmable Thermostat Heater

1 Answer

We have a White-Rodgers 90 series thermostat that started beeping last night. We have had it for about 4 years. Does it have a battery? I couldn't find anything about that in the manual.


Susan, the "90" series of thermostats covers a couple of different thermostats made by White-Rodgers. Here's how to find your model number. With that info, I can check the manual specific to your thermostat.

In the mean time, check the display for the word BATTERY or BAT. (Flashing) on the display. Battery flashing or blinking on the digital display indicates low batteries. If the batteries have recently been changed and the thermostat continues to indicate low batteries, use a pencil eraser to polish each of the battery contacts inside the back of the thermostat. Do not bend them up and down when polishing or you might break them. When complete, they should all be as shiny as a mirror. This will assure proper battery back-up, allow the backlight to work correctly and remove the flashing battery symbol from the screen. Battery (Solid) on Display The battery symbol (not blinking) indicates a loss of power (24 volts) from the heating and cooling equipment to the thermostat. Normally the heating and cooling do not operate when the battery indicator is on. If the battery indicator is on, check the fuses or breakers, make sure the furnace is switched on, and verify the blower compartment door is closed properly. The battery display is designed to indicate the thermostat is running on batteries, so replacing batteries has no effect on the indicator. See No Heat/No Cool for more information. Note: Some heat only systems (zoned systems) disconnect power from the thermostat during a normal heating cycle and display the battery symbol. Millivolt heating systems always indicate battery because they do not supply 24 volts to the thermostat.

A beep often is provided as audible feedback when keys are depressed on many thermostats. You should check to make sure that no key is stuck in the "in" position or is otherwise activated.

Jan 10, 2011 | White Rodgers Water Heaters

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ITS LOCKED AT 75 DEGREES AND DONT KNOW HOW TO UNLOCK


Remove the thermostatfrom its base and replace the batteries. To remove the thermostat, grasp it atthe edges and pull toward you. The batteries are on the back of the thermostathousing. If this doesn't unlock the touch screen, continue to the next step. Check that the furnace'sfuse is not blown or that the circuit breaker is not tripped. Replace a blownfuse or reset a tripped circuit breaker, and try the thermostat again. Press the"Screen" button on the touch screen, then wait for 30 seconds andpress "Done." In many cases, this will unlock the screen and thethermostat will be ready for normal use. Wait five minutes for thecompressor timer to reset if "Wait" is displayed on the screen. Thenoperate the system normally.

Read more: How do I Unlock the Digital Display on a HoneywellRTH8500 Thermostat? ' eHow.com http://www.ehow.com/how_7267447_do-display-honeywell-rth8500-thermostat_.html#ixzz17KUJvAB9

Jan 04, 2011 | Heating & Cooling

1 Answer

How can I unlock this th


Remove the thermostat from its base and replace the batteries. To remove the thermostat, grasp it at the edges and pull toward you. The batteries are on the back of the thermostat housing.

Read more: How do I Unlock the Digital Display on a Honeywell RTH8500 Thermostat? ' eHow.com http://www.ehow.com/how_7267447_do-display-honeywell-rth8500-thermostat_.html#ixzz17KTxLwBU

Dec 05, 2010 | Honeywell Heating & Cooling

1 Answer

Model # RTH 1108 stopped displaying the


is my thermostat( honeywell rth1108) somehow to my attic fan. cant find a off switch for the fan. seems it is controlled by the thermostat.

Nov 29, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Oven quit working burners and digital display work fine


Check to see if the coils are properly connected. If so, you may need to replace the thermostat unit, which monitors the actual oven temperature. Hope this helps.

Jul 24, 2009 | Kenmore 91112 / 91114 / 91117 Electric...

1 Answer

How to remove thermostat cover to replace


the cover pulls off if it has a green screen then most likely takes batteries if does not light up then no batteries with a small piece of insulated wire jump from green to red if indoor fan does not come on then transformer bad

May 15, 2009 | Honeywell Programmable Thermostat Heater

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