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You should first try unscrewing the two small screws in the bottom corners, taking the thermostat off the sub-base and replacing the batteries.

This is not coming up as part number. Is this oil or gas? What transformer are you trying to replace?

Either one will do the job. If you have a motor with two (usually brown wires) for the capactor then use it.

Keep the other capacitor exactly how is was, except when you swap motors there will no...

Is this a mini-split/ductless unit?? Follow the instructions!!

As far as standard split systems go (inside air handler with ductwork and an outside condenser) this may help:

Colors don't...

Okay, as long as you have a wire, go to the air handler where all the connections are for the thermostat.

A 24 Volt transformer has either two screw-terminals on it, or a pair of low-voltage...

First of all is the thermostat set for fan-"Auto". If it is "On" then it will run constantly. Some thermostats have a switch, some are a little more fancy.

Is this a mechanical fan/limit control...

There is a pressure switch on the direct vent system. You will see a box roughly 4" X 6" with two low-voltage leads going to it (make sure with a volt meter that they are in fact low-voltage).
...

One simple question first, does your thermostat have batteries that may need replacement?

You said that heat and ac doesn't work, but you put it to fan-on and the blower runs, right?

I would...

You will need to pull the blower assembly out and measure the diameter of the blower wheel, the height and the size of the motor (HP, Voltage, RPM's - on the label of the motor itself). You can then...

There isn't always a low-voltage wiring diagram.

Typical terminal designations are:

C - Common of 24V Transformer
R- "High Side" of 24V Transformer
W - Energizes Heat Relay
Y - Energizes...

In the first diagram I sent you the thermostat terminal designations are 4,5,and 6. On yours the 4 would be the W, 5 would be the R, and Y would be 6.

If you have an external 24V transformer...

OK - I just looked a little more closely at your diagram. What type of system is this connected to? Is it a combination Hot and Chilled water system?

Here is the diagram for that exact valve from...

I have a couple of quick questions so I can better understand your system. This is a hot-water boiler with zone valves, correct?

Are the thermostats controlling Air conditioning as well? What...

Is this oil or gas?

Fan-On puts the unit on in cooling-speed.

There is some type of Fan/Limit Control for the heat.

It has a probe usually right above the heat exchanger that senses the...

Another option would to be contact your local Grainger and give them all the info. They are good at finding replacements if GE is difficult.

Are you sure this the model number? I cannot locate it. Please provide the main model number of the air handler.

Did you buy this new? I would contact the vendor.

What is the outside temp? It it humid where you are? Like said before - try setting at higher temp and see if it stops. What type of system is it? Is it cooling?

Could be sensor, could be dirt/lint/spider-webs, etc.

Zone valves take 24V to operate. One wire on each of the ZV's will be connected together to a common, and then the thermostat "breaks" the power to the other wire (the tstat connects R to W). The "R"...

How long did you wait for the blower to turn off? Some systems have time delays in them to improve efficiency (cool heat exchanger down and same idea for cooling coil).

There could also be a...

What red light are you referring to? What is the model number? Is the system working?

Can you provide all the specifics.. model, etc.

I would start by checking the capacitors in the unit. Does it trip the breaker?

Basically this is what Honeywell came up with for terminal designations:

W, W1, W2 - Heat Relay (1 and 2 means single or dual-stage heat)
Y, Y1, Y2 - Cooling Relay(s)
G - Fan Relay
R -...

Absolutely. There are two capacitors or a single "split" capacitor. One is for the fan motor and one is for the motor for the compressor. The hum you are hearing is actually the compressor motor, not...

Is it definitely coming from the compressor, or could it be the fan blades impacting something? If one of the mounts are broken I've taken some anti-vibration pads and wedged them underneath the...

Are you sure you have the correct kind of gas? LP or Natural Gas are not interchangeable unless you change the jet.

Many times cased coils are only available and depending on the installation they can be "uncased" and placed into the ductwork, i.e.: in a furnace. If it is a new install then many times the cased...

Check the air filter first. Is the blower running at all in the air handler? Ice is caused either by not enough air flowing across the coil inside the air handler or low refrigerant.

Grady was exactly correct.

Find out if the reversing valve is energized for heating or cooling (check manufacturer's specs or the wiring diagram on the inside cover of the heat pump).

Then you...

I would first check to see if the air filter is clean. Then check (after shutting the power off) to make sure that there is nothing that got sucked into the blower wheel itself.

Is it possible...

I would first check to see if the air filter is clean. Then check (after shutting the power off) to make sure that there is nothing that got sucked into the blower wheel itself.

Is it possible...

The job of the capacitor is to give it a "kick" to get it moving. On the side of the motor itself it will say the correct capacitor for the motor. I'm sure they sent you the correct one with the new...

Do you have multiple thermostats going to this one furnace, is it zoned? What model thermostat did you buy? With certain damper panels there are master and slave thermostats and some thermostats will...

Did you happen to make note of which wires went to which terminals on the old thermostat? It is pretty much up to the guy who wires it as to which wires go where. Usually they follow the following:...

Unfortunately, the color of the wiring is pretty much up to the person who installed it. Did you write down what wire went to what terminals on the old thermostat? Some old thermostats have wires...

Does the blower run? Sounds like it may have a problem with the blower, and the unit is shutting off on high-temp.

Has this unit ever worked? Do you have it setup with an outdoor sensor? Usually the error E3 message is related to the ODT sensor. If it is operating in manual mode, then there is a resistor that...

What is the temperature in the house and what do you have the thermostat set at? Does it show either "HeatOn" or little flame showing that the thermostat is calling for heat?? Where is the green...

The directions are usually written on the front of the unit. Does this have electronic ignition or is it a standing pilot light?

It sounds like you have a problem with the blower. The unit will run until it reaches High Temperature Limit and then shut-off. Like T-Top said try turning the thermostat to FAN-ON. If nothing...

The best way to bleed out an oil burner is to do the following:
1. Open the bleeder port on the fuel pump (left side of the burner) and place a small pail under it to catch the oil. Use a 3/8th or...

The breaker trips because the load exceeds the rating for the breaker. Usually this happens when the blower motor first starts running. Depending on the type of blower, there are oiler ports on the...

Is this a direct replacement - same models? Is the voltage the same for both units? Usually the Green wire is the ground. The White wire is the common, or neutral. And the Black wire is the hot. I...

What kind of thermostat do you have? I would check the batteries in the thermostat.

Is this a Honeywell thermostat? Usually this means the batteries in the thermostat are bad or it isn't getting power.

It says in your original post that you have W1 jumped to Y... is that correct? The W1 and W2 turn on your heat (1 is stage 1, 2 is stage 2). The Y-wire turns on the outside condenser. You probably...

Is this a gas or oil furnace? Is this blower a power venter? If you have oil heat you need to have the service done once a year by a decent company to keep everything clean. Gas requires less...

Sounds like you need to have somebody look at it. When you are in regular heat or cool does the outside heat pump come on? I would start there. If it doesn't come on I would start by checking the...

Why don't you try a thermostat with adaptive-intelligence, such as the Honeywell Vision Pro 8000. When you first install it, it will automatically turn itself on in the middle of the night, and...