Raypak 106/156 Thermal Cut-Off Fuse Kit | 005899F

Raypak 005899F Thermal Cut-Off Fuse / Fusible Link (Rollout Safety) – Replacement Kit

The Raypak 005899F is a safety thermal cut-off fuse (fusible link) used on select Raypak pool and spa heaters. It is designed to open the safety circuit permanently if excessive heat conditions occur in the burner/firebox area, helping protect the heater from damage caused by abnormal combustion or flame rollout conditions.

Key Details

• Part Number: 005899F
• Type: Thermal cut-off fuse / fusible link (non-reset)
• Function: Safety shutoff in the rollout/overheat safety circuit
• Common rating listed: 152°C (varies by manufacturing run; verify your existing part markings)
• Typical electrical rating listed: 15A, 250V (verify your existing part markings)

Common Compatible Heater Families

• Commonly listed on select Raypak heater series such as 106A / 156A / 206A / 266A / 336A / 406A (verify by your heater model/serial and parts diagram)
• May also appear on additional Raypak P-R series variants depending on revision (confirm fitment before ordering)

When to Replace

• Heater will not fire and troubleshooting indicates an open thermal fuse/fusible link
• Visible heat damage, discoloration, or brittle/cracked fuse body
• Safety circuit opens after a heat/combustion event and the fuse will not reset

Important Safety Notes

• Do not bypass a thermal cut-off fuse. If it opened, the heater likely experienced an unsafe condition that must be corrected.
• If the new fuse opens again, stop operation and inspect for root causes such as restricted airflow/venting, blocked burners, debris, improper gas pressure, or combustion issues.

Installation Notes

• Shut off power and gas to the heater before service, and allow the unit to cool completely.
• Replace the fuse in the same location and orientation as the original, using the proper mounting hardware and secure electrical connections.
• After replacement, verify normal ignition and stable flame characteristics before leaving the heater in service.

Related Products

• Search: Raypak 005899F
• Search: Raypak Rollout / Safety Switches
• Search: Raypak Pilot Assemblies
• Search: Raypak Igniter / Electrode
• Search: Raypak High Limit Switches
• Search: Raypak Burner Tray / Burner Parts
• Search: Raypak Heater Parts

Installation & Maintenance Tips

• Keep the heater cabinet and combustion air openings clear of leaves, dust, and insects to reduce overheating and rollout risk.
• Inspect venting (where applicable) for obstruction and proper termination clearances.
• Maintain proper water flow and clean filtration—overheating and short-cycling can contribute to repeated safety events.
• If you have repeated nuisance shutdowns, check gas pressure, burner cleanliness, and combustion setup before replacing additional parts.