I am renting a house with two HVAC units - one upstairs and one downstairs. There were two condensate drain lines (one per unit). The units were older so when they quit working efficiently the landlord replaced the units.
Shortly after the new units were installed we started having problems with the condensate line for the downstairs unit. The technician's solution was to divert the downstairs condensate line into the upstairs condensate line. So now we have two HVAC units draining into one line. We are still having problems with the downstairs unit tripping the safe-t-switch valve because the condensate line backups.
The HVAC company came back out and is blaming us for not keeping the line clean with vinegar every month (which we do).
- Does it make sense to drain two units into one condensate drain line? We live in Florida where we produce a TON of condensation and
- Shouldn't there be a back-up drain line since the units are inside the house and the leaking could cause structural damage? Just doesn't seem logical to have two units on one drain line especially since we are having a back-up issue.