I spoke with my contact at Lippert who said that either the heater is bad or the control box needs to be replaced on your Thomas Payne Momentum recliner.
To test the heater unplug the red and black wires from the control box (located behind and under your recliner) and test for continuity using a multimeter like part # PTW1714. If you continuity then that means the control box is bad and you can replace it with part # 195-387596.
If you don't have continuity then the heater is bad and... view full answer...