The fan on the outside unit of my approximately 10 year old Carrier heat pump will no longer shut off. It has now been running for 24 hours, and the unit is started to get a fair amount of frost on it. I called for a technician to come take a look but the appointment is not until Thursday (2 days from now). Do I risk damage to the unit if it continues to run? If so, what should I do to avoid damage until the repairman comes?
Additional info: Recently purchased an older home (ie 4 days ago) with a heat pump. Yesterday, the fan on the outside unit will now not turn off, even if the house is at temperature, the inside fan is not running, or even if the mode is set to OFF on the thermostat. Outside air temperature where I am (Pacific NW) is currently high/low of 43/30 F. Could not find any way to shut the unit off directly, and tried flipped all the breakers in the breaker box which oddly did not shut it off either (although there is another box nearby which looks like breakers but is unlabeled. This is not my area...). This is the first heat pump I've ever had so I don't know much about them.
Thanks in advance for any help.