An appropriate forum for my question may not exist.

[Susan Calvin]

8. ASZC160361

My heat pump unit is in the attic, where I haven't been in over a decade. But I managed to locate the warranty paper, which had the model number and serial number. No, the air filter is not clogged. The thermostat reminds me when to change it.

The heating function has basically never worked well when it got cold enough, and I've basically always been convinced that the radiant heat panel is either not functioning at all or not functioning correctly. Everything else about the unit is great.