Tech found 2 stack sequencer receiving 24v biput not engage 5k w heat strip system is straight ac with 5k heat strip on. Technician quoted out a sequencer customer approved repair. Once technician replaced sequencer system started heating. 55 degrees return 75 supply.
- Tech found system operating normally upon arrival. Tenant advised that the thermostat does not turn the system back on after it is satisfied. - Confirmed failing thermostat and recommended replacing. Customer opted not to replace at this time. Confirmed R-22 refrigerant charge and recommended pulling the thermostat blower wheel to clean. - Recommended full system replacement. Advised tenant how to navigate the thermostat settings until replaced. System is operating at this time.
Upon arrival tech found system heating properly as well as heat strips coming on as needed. Tech forced a defrost and system hesitated and did not initiate properly. Reversing valve and pressures are within spec, defrost sensor tested fine. Recommend replacing defrost board, system is very old.