our electric heating cooling unit continuously runs. during the winter we had to run the heat on emergency heat because the unit would not kick, the house always stayed comfortable. now we have attempted to run the unit the last 2days (for the first time for this spring) it cools very well but the fan runs continuously and last night the pipes that are inside (where the filter area is located) frozen up.
noidea burrow

My first thought would be that the contactor in the out door unit has the points stuck together. Can you turn the unit off from the thermostat? If not it could also be a short between the wire on the Y terminal and the wire from the R terminal in the thermostat.

Tell me a little about the AC, does it cycle off and on by the thermostat but the fan keeps running or does the AC not cycle off and on.

thanks for reviewing my question, to tell you alittle about my unit as letmetellu requested. It is a Carrier Unit I am not sure of the age we just purchased last yr. The answer to your question: yes you can turn the unit off by the thermostat and the fan does continue to run, and yes it cycles on and off by the thermostat and the fan continues to run. I read on the inside unit some electrically plate on the unit it has a Supply Circuit-Dual. I really do not know if that information is relevant. thanks again and i appreciate your feedback!

The indoor fan always runs or the outdoor fan??? If it is the oudoor unit, i agree it is probally the concactor

If you had a high electric bill in the winter and the unit never shut off, the electric heat strips was taking over because the heat pump was not able to take the load. If it runs all the time in cooling and not doing its job and the refrigeration line is freezing up you got a problem: Air flow or low on refrigerant. By the way your describing it I would say its low on refrigerant.

Joshdta, it is the outside unit that continues to run. What is the contactor? How can this be tested to find out if it is the problem? Thanks for the feedback!

electric bill was high at first, until we started the emergency heat, the cooling works good and then i believe when the thermostat mode is turned to off the vents have warm air blowing out, the blowing from the vent is not a normal blowing pressure but is very little pressure......no idea and i do not know any a/c terms yet still learning

If the out side system runs after you turn the thermostat to off. you have a bad contactor(stuck closed).

http://yueqing-shi-shinaidi-electrical.tradenote.net/images/users/000/102/716/products_images/283101.jpg

see the small two buttons in the middle?? after you turn the t-stat off these should pop back out, if the dont then they are stuck closed. TURN THE 220 VOLT POWER OFF and the t-stat and try poking them with a screw driver you may be able to free them, but odds are you will need a new contactor.

You might need freon.

Reply Soon!

Mower_Man!

P.S:Ballengerb1 Dosen't Know His Facts!!