Heat not working - Part will take 3 days to arrive. Advice needed

[Robert Fountain]

Yesterday I received a call from my tenant saying the heat wasn't working.  I had my HVAC guy over that afternoon and he identified the problem.  There are 2 parts that need to be ordered and he informed me they will take 3 days to come in since they don't have any on hand (it's winter so they must be low on stock).

I provided the tenant with space heaters and they said they temperature was comfortable.  It's supposed to get colder this weekend and I"m hoping it gets repaired but if they parts don't come in what steps should I be taking to make sure the tenant is taken care of?

Just looking for some advice.

Thank you