I have a split electric system with a heat pump. It looks like my condensate drain line is frozen. I switched to supplemental heat which does not use the heat pump. Is this enough for now? Our hard freeze will be over in 2 days and we will be back to temps in the 50s
Your inside coil should have two outlets to drain condensate, one running outside and the other with a float switch to shut down the unit if the outside drains clogs. You can unscrew that float unit and put a bucket there to drain the condensate until the line thaws.
You should also figure out how to correct your condensate line so that it can not freeze. In climates where freezing of the condensate line is possible, you have to run it so that you maintain an air lock on the line (with a p-trap), but also do not expose the water creating the air lock to freezing temperatures. like this:
Notice that, starting at the a/c unit, the condensate line has in this order:
All of this needs to be laid out so that everything from the air handler through where the condensate line starts its downward slope will not freeze. Since the line is sloped down, it will drain, even in cold weather. It's also important to minimize the amount of line exposed to freezing weather in order to prevent the water from freezing in cold section of the line.
Also, in emergency heat mode, you may not be able to generate enough heat to keep the house comfortable. It used to be that the emergency heat coils had to be large enough to heat the house by themselves. Since heat pumps have been on the market for quite a while and their reliability and availability has improved, that is no longer the case.