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My thermostat has a blank display. I reset the circuit breaker but did not resolve. I added 2 AAA batteries and so I get a default reading but nothing happens when I set the thermostat on.

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  • jesusbrwn Jul 29, 2009

    I found it. I went up to the attic and noticed a circuit breaker on the drip pan. As I moved closer to it I realized that the drip pan was filled with water. As I began emptying the water the AC turned back on.

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I thnk there must be some problem with the thermostat itself. check it out. its has got some firmware problem.

Posted on Jul 27, 2009

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Posted on Jan 02, 2017

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2 of my 4 programmable thermostats have suddenly gone blank after 2 years of operation. The ones affected are on the same circuit on my panel. The others are on their own circuits and are working fine


I once thought the same of a thermostat Honeywell that I had, as you say it has no batteries. Well I finally started to take the thermostat apart and guess what I found, a battery a small button battery. When I called Honeywell the fellow didn't know what I was talking about. I replaced the battery and thermostat is working. It has to do with no more mercury in the thermostats. Look deep. GOOD LUCK FRIEND.

Jan 10, 2015 | Honeywell TH115A024T Aube Thermostat

1 Answer

Ti 83 will not power on replaced all batteries


When you clear memory, the contrast sometimes changes. If the screen
is faded or blank, adjust the contrast by pressing 2nd and up- arrow or down- arrow keys .

Resetting RAM restores RAM system variables to factory settings and
deletes all nonsystem variables and all programs. Resetting defaults
restores all system variables to default settings without deleting variables and programs in RAM. Resetting RAM or resetting defaults does not
affect variables and applications in user data archive.
Tip: Before you reset all RAM memory, consider restoring sufficient available
memory by deleting only selected data.
To reset all RAM memory or RAM defaults on the TI-83 Plus, follow these
steps.
1. From the RAM ARCHIVE ALL menu, select 1:ALL RAM to display the
RESET RAM menu or 2:Defaults to display the RESET DEFAULTS menu.
2. If you are resetting RAM, read the message below the RESET RAM
menu.
• To cancel the reset and return to the home screen, press .
• To erase RAM memory or reset defaults, select 2:Reset.
Depending on your choice, the message RAM cleared or Defaults
set is displayed on the home screen.

Mar 25, 2012 | Texas Instruments TI-83 Plus Calculator

2 Answers

Ti 83 will not power on replaced all batteries


When you clear memory, the contrast sometimes changes. If the screen
is faded or blank, adjust the contrast by pressing 2nd and up- arrow or down- arrow keys .

Resetting RAM restores RAM system variables to factory settings and
deletes all nonsystem variables and all programs. Resetting defaults
restores all system variables to default settings without deleting variables and programs in RAM. Resetting RAM or resetting defaults does not
affect variables and applications in user data archive.
Tip: Before you reset all RAM memory, consider restoring sufficient available
memory by deleting only selected data.
To reset all RAM memory or RAM defaults on the TI-83 Plus, follow these
steps.
1. From the RAM ARCHIVE ALL menu, select 1:ALL RAM to display the
RESET RAM menu or 2:Defaults to display the RESET DEFAULTS menu.
2. If you are resetting RAM, read the message below the RESET RAM
menu.
• To cancel the reset and return to the home screen, press .
• To erase RAM memory or reset defaults, select 2:Reset.
Depending on your choice, the message RAM cleared or Defaults
set is displayed on the home screen.

Mar 25, 2012 | Texas Instruments TI-83 Plus Calculator

1 Answer

I had a problem with the lock remote control. Please help me how to unlock the remote.


  1. 1
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.
  1. 2
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.
  1. 3
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.
  1. 4
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 12, 2011 | Haier Heating & Cooling

1 Answer

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

Unlock code for honeywell thermostat TH5110D1006


No code for unlock, but try with following method:

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.
  1. 2
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.
  1. 3
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.
  1. 4
Wait five minutes for thecompressor timer to reset if "Wait" is displayed on the screen. Thenoperate the system normally.

Dec 08, 2010 | Heating & Cooling

1 Answer

My 4yr old Amana heat pump quit working - the thermostat display was blank. I replaced the thermostat but still no luck after confirming it was installed correctly. My S/N is 0407477962, Model VNC60C2A,...


Your thermostat can get power from either of two power souces. Primary power would be 24 VAC from a transformer mounted inside your air handler. Second (optional) power may be provided from battery backup, with the batteries mounted inside the thermostat itself.

Since your display went completely blank, then I would venture to guess that it is related to the 24 VAC circuit, sourced from the air handler. You probably do not have battery back up. Use a DVOM (Digital Volt Ohm Meter) to measure the RED wire connected to your thermostat. Make sure to use the VAC setting on the DVOM.

The "hot" side is the red wire, and will be connected to the "R" terminal in your thermostat. The Common side will be connected to most likely a blue, a black, or a brown wire. The Common terminal will be labeled "C" (but perhaps B) on your thermostat.

Since the thermostat is just plain dead you should next locate and check the fuse or breaker for the air handler control circuitry. There may be multiple different breakers/fuses for your heat pump's outdoor circuitry, its indoor controls, and its indoor resistive heat strips. Also, the circuit could be either 120 VAC or 240 VAC. Has one of them tripped or blown a fuse?

If you have breakers, then flip all of your breakers off and then back on. Stay near the breaker box and wait for a minute, listening/looking to see if any breaker has tripped or if a fuse has blown. Otherwise, if the circuit is fused, then examine or test the fuse. Again, use your DVOM, this time in the Ohms setting. Zero Ohms indicate the fuse is good. A very high Ohms reading is a blown fuse (infinite resistance) In this case, verify that the blown fuse is the CORRECT value. Maybe it isn't. Replace it with the correct amperage fuse. Again, wait a few moments and see if it the new fuse blows.

If either the new fuse immediately blows, or if the flipped breaker immediately trips, then STOP and call a professional. You have a high-power wiring problem. Call around, and find an expert. It could be that a mouse chewed thru some insullation. You don't know, but don't be sold on replacing an expensive component without verifiable proof of the source of the problem.

Otherwise, go back and check your 24 VAC "R" Red terminal at the thermostat. If it reads 24VAC hot now, then you have solved the problem, at least temporarily. You now need to know why the breaker tripped or the fuse blew.

If the circuit is on a breaker, then just replace it. They really do go bad after a while. Pop the old breaker out and bring it with you to the hardware store. Replace it with the correct brand, amperage, and configuration.

If the circuit was on a fuse, then (a) was it really the correct amperage rating? or (b) is there a chance that you had a hit from the power company or a nearby lightening strike? (probably not, or some of your computer/stereo/other stuff would have been knocked out too.)

Otherwise, you know the source circuits are good, and you know you don't have 24VAC at the "R" terminal of your thermostat. There are now more possibile causes.... to be continued. Marty

Dec 09, 2009 | Amana PTH123B25AJ Heat Pump Air...

1 Answer

HONEYWELLTL8230A1003 THERMOSTAT, THE SCREEN GOES BLANK THEN ON F


Well, it's an be only one of three things then (in order) -

1) Bad wiring connection, particularly the middle pair of white and black wires connected to the supply wiring, or
2) One of the breakers or fuses has tripped or blown, or
3) Bad thermostat.

If 1 is OK, check 2 (double check if breakers, sometimes they don't look tripped when they are), and lastly, take the stat back and get another one.

The ground is secondary, and it is assumed your living in a house where 14-2, 12-2, or 10-2 with ground was NOT used. If it was, hook up the ground. If not, it's OK. The grounding requirement was added to the NEC after your house or whatever was built. It is not electrically active or needed for this circuit.

Reply back what your findings are. Will be glad to help!

Feb 01, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Heat


If the rating of circuit breaker is ok, and the unit is operating normally( with normal current reading) then you have replace your circuit breaker with same rating.

Dec 31, 2007 | Honeywell Focus 6300B 5-2 Days...

1 Answer

Oven control panel


Lok at your manual tp view all the possible control options. However, the solution could be; The touchpads, in conjunction with the dial, are used to select an oven mode, 
set the oven temperature, set the time(s) and to set up your range. To use the 
touchpad, press the center part of the pad with the flat part of your fingertip. A 
beep will sound to indicate that the selection has been made. Turn the dial to the 
desired setting and press START. 


Pull the plug or flip the circuit breaker, wait five seconds and plug in the range or flip the circuit breaker to on. Always set the clock after installation or after a power failure. Once power returns to the oven, the clock defaults to 12:00 am.


Clock time display can be turned off. The default display is on. 
1. Access SELECT FUNCTIONS Menu. 
2. Turn knob clockwise until CLOCK DISPLAY is displayed. 
3. Press START. 
4. Turn knob to select ON or OFF 
5. Press START to accept new selection.


Reset the Factory Settings This feature is used to change all the “Select Functions” settings back to the original factory settings (or defaults). 
1. Access SELECT FUNCTIONS Menu. 
2. Turn knob clockwise until RESET DEFAULTS is displayed. 
3. Press START. Display reads SELECT FUNCTIONS.

Dec 03, 2007 | Bosch HES 24 / 6HES 242 / HES 247 Electric...

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