September 1, 2016 Jeff Rosenblum & Collin Murphy
We’ve had numerous questions over the last few weeks where a heating contractor is replacing a heat pump system for a homeowner and they want to use the existing air handler and just replace the coil inside. There are various reasons why you can’t or you shouldn’t replace only the coil. Instead, replace the entire air handler.
We’ve seen the negative side effects when trying to match up a coil or selecting the wrong coil. We have seen liquid slugging back to the compressor in AC mode and head pressure issues in heating mode. Both of these issues can reduce the lifespan of the equipment.
It is fitting to also talk about airflow. Proper airflow must be set and verified before the charge can be checked. I always tell people that if I purchased a 3-ton system, I want 3 tons of air! Why sell a 3-ton system but only deliver 2 tons? Incorrect airflow can cause several issues like:
As always, if you need any help with your heat pump, feel free to call the Famous Supply Tech support department at 330-962-2491.
JEFF ROSENBLUM – Training & Technical Support
COLLIN MURPHY – Armstrong Air/Concord Equipment Specialist