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Trying to remove an old t87f2873 with heat-cool subbase from wall. which screws do you loosen to do this.

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There should be three small slotted screws at 9 o'clock, 2 and 5. This will remove the thermostat. There will be two screws holding the subbase on the wall.

Posted on Feb 01, 2010


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How to take a honeywell radiator off the wall

Turn off the circuit breaker to the AC and heating unit. The circuit breaker is inside the home electrical box. The door of your electrical box has a guide indicating which circuit breaker controls the cooling and heating system.Pull the cover off the Honeywell manual thermostat. If necessary, use a flat-head screwdriver to pry the cover away from the base of the thermostat. Locate the two small screws securing the sub-base to the base of the thermostat. The sub-base is the portion of the thermostat that has the indicator dial or indicator lever. Remove the screws with a Phillips-head screwdriver, and pull the sub-base away from the thermostat.Remove the screws securing the base of the thermostat to the wall with the Phillips-head screwdriver. Pull the thermostat base away from the wall so you can access the wires.Loosen the terminal screws securing the wires to the back of the thermostat with the flat-head screwdriver. Wrap the wires around a pencil or a large screw. This will prevent the wires from accidentally falling inside the wall cavity.

Jun 12, 2011 | Honeywell Heating & Cooling


The MOST common problem with laptop (CPU) over-heating is caused by DUST/LINT...

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Monitor computer temperature using a software, check if Fan is coming up when temperature gets critical.

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If fan does not come up, and critical temp is not detected, then the sensor on motherboard is bad, this is very uncommon. When this happens the problem is usually related to system or power settiings , rather than overheating.

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By using the software below you can also find out if the problem is really overheating. If temperature results within normal range, then usually it is not overheating.In that case test systtem and check power saving settings.

Here is the software to control your fan and temp. sensor state:

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on Jun 04, 2009 | Acer Aspire One Netbook 8.9" Notebook

1 Answer

Our Honeywell programmable thermostat is close to 20 years old. Within the past week or so I have notice that while the program shows the heat should be at 68 degrees, the thermostat is reading as low as...

Good Morning, and yes you said it. Anytime a stat doesn't come on when it is set for a call for heat or cooling, the sensor on the subbase of the stat has lost its ability to sense the correct temperature. I have seen mechanical stats last as long as 25 plus years, but that's truly amazing for a digital stat to last that long. Yes, replace the thermostat. I don't know what kind of system you have, but if its a gas furnace with an a/c, the wiring will look like this. You will have terminals marked R, Red, for the 24 volt hot wire, G, Green, Y, Yellow, and W, White for heat. Going back to the red wire, it should have RC and RH on it. There will be a normally red wire connecting the 2 terminals.The Red wire coming in can connect to either one, as they are all together. The new stat will come with the new Red jumper wire attached. So, if you do have a gas heater, this is very easy to install. The only terminals you will need to use are RH to RC for the incoming red, Y, G, and W for heat. Y is for cool, and G is for fan. Very easy. Now if you have a heat-pump, they have many more terminals and can be a problem wiring them. If you have gas, forget the heat pump. I wont confuse you by going there. If it is a heat-pump, contact me in the comment box to let me know, and I can help you there also. Get a new stat at Home Depot, Lowe's Hardware, or O.S. Hardware. You want a 5 day, 2 day programmable Heating and cooling thermostat, 24 volts.It will have everything you need. See if it takes batteries for the display, they may not come with those, it will say on the box. Turn off your power to heater, so you won't short out the new one.They come in 2 sections, first the stat that just snaps on, and the subbase that is screwed to the wall. It will have the wiring terminals on it. Remove a couple of screws and loosen wires and remove. Be sure you write down how the wires go in case they used different colors, you never know. You will be all set. Store the manual in a safe place for future use. I wish you the best.
A/C, Heating, & Refrigeration Contractor.
PS, Please rate me on this :))
Happy Holidays to you and family!

Nov 23, 2010 | Honeywell Programmable Thermostat Heater

1 Answer

I bought the amcorair one of the inside units is not working right. IT IS SET ON 72 degrees and it does not cut on even at 66 degrees.

Hi, from what you are saying, it sounds as though you have a control/thermostat problem. You say it doesn't work right, so I am assuming it does work, but just does not come on when the stat calls for heat. Make sure you have 24 volts to the stat. Turn the fan to the on position to see if it comes on. If so, you have power. If the heat is not coming on at 66 degrees, and you have it set to call for heat below 72, you do have a problem with this stat. The room sensor is mounted in the circuitry of the subbase, or second section of the thermostat. There is nothing you can do to repair this stat, your only option is to replace it. If you have both heating and air, you will need a stat for that. If you have gas heat get a regular central heat and cooling stat, 24 volts. If you have a heat-pump, you will need a heat pump stat. The best thing to do, is shut off the power to the indoor unit. Remove the first section of the stat, it should just unsnap. You may need to pull some to get it off. Then you will see the subbase with the wire terminals. If you have gas heat, it will be marked something like this. RH to RC with a red wire connecting the two. You will have a smaller red wire coming in from the indoor unit which can go to either one. You will see Y yellow for cool, W white for heat, G green for fan. If its a heat pump stat, you will have many more terminals such as o/b, may have E and C, w-1, w-2. Draw you a diagram of the wiring and the terminals they go to. Now, remove the subbase. It will be held to the wall with a couple of screws. Take it with you, and go to Home Depot, Lowe's Hardware, O.S.H. to get a stat. Try and find the same one, but it will not matter as long as you have the same terminals. Many stats will work on many units. Install it in the reverse order. This drawing is very important for you. This will indeed solve your problem, and is very simple to change out. If you have any questions when doing this, please contact me, as I will check in on you. It may take time for me to respond if I am on another call. Please don't forget to rate me on this, I know you will be kind! :))
A/C, & Heating Contractor PS, Don't loose the manual for your new stat!! Put it in a safe place, this is very, very important.

Nov 21, 2010 | AmcorAire UCHW-H12AF2 Split System Air...

1 Answer

How do you open the hand control to change battery for heat pump?

Hi, sometimes the thermostat covers can get stuck. Just grasp the front section of the stat and move it around until it comes apart. There will be 2 sections, the stat and the subbase which is screwed to the wall. This is where you will find the batteries if it has them. It will come apart, you just have to pull slightly and it will come apart. You can do it Marie.
A/C, & Heating Contractor
Please don't forget to rate me! :)

Nov 20, 2010 | Heating & Cooling

1 Answer

How do you open this totaline programmable thermostat to changed the low battery?

Hi, just grasp the front of the thermostat and work it back and forth. It will come loose from the subbase that is screwed to the wall. This is where the batteries and control wires are terminated. It will look and feel as though it is one unit, but it will come apart, it has 2 sections, the stat first, and the subbase last. It may be stuck but it will come off. They snap together. Good luck, you can do this.
A/C, Heating Contractor
Please rate me on this! Thank you :)

Nov 19, 2010 | Heating & Cooling

3 Answers

I need to know how to change he door seal(gasket)

  1. Buy a gasket that fits your door exactly.
  2. Soak the new gasket in hot water in the sink to make it pliable.
  3. Make sure the refrigerator is level.
  4. Find a nut driver that will fit the screws holding the old gasket in place and lay out your tools where you'll be able to reach them.
  5. Start at the top outside corner of the door and fold the old gasket back as you partly loosen the screws along half of the top and side. Don't loosen them all the way.
  6. Pull the old gasket out.
  7. Attach the new gasket by pushing it beneath the metal retainer and tightening the screws as you go.
  8. Replace each section the same way.
  9. Shut the door and check for gaps. The seal should lie straight and smooth all the way around the door.
  10. Notice if there are gaps between the gasket and the frame - this may indicate that the door has warped. (Fix it by loosening the screws and twisting the door a little. You may have to do this a few times before you get the door straight.)
  11. Put a flashlight in the freezer pointed toward the opening and shut the door. Turn off the lights. You shouldn't see any light leaking through.


Oct 29, 2010 | Refrigerators

1 Answer

How to remove the cooling fan

They are usually mounted on with plastic clips, sometimes with screws. Use a small screw driver to loosen the clips on all the sides at the same time so the fan can some off.

Feb 27, 2010 | Intel Socket 775 Heat Sink and Fan up to...

1 Answer

When air conditioner is turned on only heat blows (in heat and cool) but not in fan only mode. It is a package unit, and has an old mercury thermostat, I was going to replace the thermostat with a digital...

Hi; Ok lets try something. Kill the breaker to the package unit. Then remove the outer electrical cover where the tstat wire goes into. Be very carefull if warm outside some wasp could be looking for a home...Now look at the tstat wires connected to the control board or check the wirenuts if no board.Is every thing secure.No look for any chaffing of the brown insulation on the tstat wire at the unit, under the house, at the tstat. You can remove the first cover by pulling gently from the bottom up. Now You will see several small flst tip screws inbedded in the plastic base. loosen the screws but do not try to dislodge from the plastic base. The screws are done this way for a reason,so You dont loose the little suckers. No remove the subbase gently. Look at the connections are they secure. Question is this a heatpump or air conditioning with gas or electric strips for heat...alpharome416 PS
As far as the fan switch goes. The tstat has two choices for fan operation(auto,on). When in auto fan will come on durring operation only. In the on position the fan will run continous cooling or heating all day long...alpharome416

Feb 22, 2010 | Heating & Cooling

1 Answer

Oven will not heat

Most likely, your lower heating element has failed and needs to be replaced.

This is a simple step-by-step procedure...

1. Turn off the power to the oven at the breaker panel. Or slide the oven ahead and reach behind to unplug the power cord.

2. Take out the two screws holding the element bracket in place. These will be on the back wall of the oven. They are usually hex head or phillips screws.

3. Carefully pull the element toward you a little bit until you see the two wires behind it. Unscrew the wire leads and remove the bad heating element.

4. Handle the new element carefully while you attach the wire leads to it with the old screws. Don't stretch the wires any more than you have to.

5. Line up the new element while tucking the wires back in place. Be sure not to pinch the wires between the bracket and the back wall.

6. Fasten the bracket screws, making sure they're tight.

7. Restore power to the appliance and start your oven to check if the new element heats up.

A few things to remember...

You are working with high voltage! Be sure the power is off or the oven is unplugged!

If you find one of the wires has come off the old element, simply reconnect and check your oven. Your old element may work again and you will not need to purchase a new one.

In removing any of the screws mentioned above, note that they may be difficult to lossen due to years of exposure to heat. Don't give up, they will eventually loosen.

Your new element may have some oil or other gunk on it due to the manufacturing process. Once it begins to heat, it may start to smoke. Don't panic! Any residue will eventually burn away and the smoke will cease from then on.

Good Luck!

Dec 22, 2007 | Frigidaire GLGF377 Gas Kitchen Range

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