Description
Dometic 4450037544 is a PTCR compressor start-device relay for select FreshJet 5 rooftop air conditioners and heat pumps. PTCR means positive temperature coefficient resistor; the device operates in the compressor starting circuit. Parts diagrams identify it separately from 4450037546 start capacitor and 4450037547 run capacitor.
Component identification
- Brand: Dometic
- Exact part number: 4450037544
- Type: PTCR compressor start device, not a generic thermostat relay
- Quantity: One replacement device
- Condition: New
Compatible configurations
Documented service lists include FreshJet 5 FJX5357MHEWHCS / FJX5357MHEBKCS, FJX5457MWHCS / FJX5457MBKCS, FJX5557MWHCS / FJX5557MBKCS, and FJX5557EHPWHCS / FJX5557EHPBKCS. Verify the complete rooftop nameplate and original component before ordering.
This device does not replace the capacitor or electronic control board. Disconnect all power; capacitors may store hazardous charge. Diagnosis and installation should be handled by qualified service personnel.
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