We have a carrier variable speed air handler that runs in 1 speed only.what can of thermostat do we need to make it run in different speeds.we have an ecobee 3 lite now.thank you

SOURCE: Goodman Air Handler motor will not turn off.

Look at your Thermostat wiring.
If there is a green wire going to the "G" terminal, disconnect it.

If it stops running, you have a bad T-stat.

If it keeps running, you either have a stuck fan relay or a low voltage control wiring malfunction.
Those are usually related to one of the safety switches having problems.

If green is not going to G, let me know, and we will determine which one is indeed the fan wire and go from there.

Remember, when you rate the solution, it closes further dialog, so only rate when you are satisfied with the discusion.

Thanks for visiting FIXYA!

SOURCE: What tonnage are these units and is it a variable speed.

The heat pump model number shows that it is a two and a half ton unit. I am sorry but I am not familiar with the air handler model number.

SOURCE: Trane AC Compressor fan cycling on and off.

it depends on the tempareture you have set that is why it was going on and off

SOURCE: I have a Trane heat pump, model #TWP060C300A and a

Honeywell Chronotherm thermostats have always had a great reputation for longevity and reliability. They are also much more user-friendly than the other types of programmable thermostats out there. Make sure you get one that states 2-stage heat, heat pump. T8611G will offer that for you. There are many out there that claim to be suitable for heat pumps; however, they do not have the ability to utilize your auxiliary heat strips (2nd stage of heat).
Before you attempt to replace, be sure to write the wire colors and their corresponding terminal marking on a sheet of paper........of your old thermostat. This is very important to make it easier to hook up the new thermostat. Also, before you disconnect the wires, be sure to shut off the circuit breaker to your air handling unit. You can ensure you have the right one by putting the fan switch in "ON". When you turn off the right breaker, the fan will stop running. :-)

I hope you find this information to be very helpful to you. Please don't forget to leave a rating.

Testimonial: "The information, that you provided, appears to be "right on". Thank you so much for responding to my question/problem."

SOURCE: I have 3 ceiling fans with variable speed control,

The Humming indicates the motor itself is going out. Its going to need a replacement soon.

Testimonial: "The instruction said it's suitable for solid state speed control, and so I returned the motor and got a new one."