The last couple of days our heat pump wil...

Check the outside unit. Feel the larger line to see if it is cold. Is the condensor dirty. If you have a way to measure temp. Take the return air at the filer and the closest grille temp and subtract. It should be between 19 to 23 degress. If not you have a problem. Could be refrigerant or some other problem. Either way you need to get it checked out by a service tech. Ask for free estimate that way you are going to know how much it cost before hand. Rus