Raypak heater. fault cde says (ROL)

simply replacing the roll out fuse wont solve your problem. those safeties open from an over temp situation or negative pressure down draft. clean out any dirt and debri from venting, inspect the underside of heat exchanger for build up or soot. ensure you have proper combustion/ventilation air openings if heater is in a shed. if heater is outdoors, Raypack is notorious for getting downdrafts back down the draft hood causing burner flames to come outside the burner box

Error Code ROL is "HEAT ROLL-OUT SAFETY SWITCH OPEN". The heater is equipped with a cutoff device to prevent flame roll-out in the event the heat exchanger becomes blocked. This is either a "manual reset", or "Single-use" type fusible link/thermal fuse, that must be replaced or reset after any over temperature conditions have been fixed. Excessive restriction in the heat exchanger flue passage may cause the switch to disable the heater. I don't know your exact model so I'm just generalizing. If you reset or replace the switch, and it trips/burns out again, then you need to address what is causing it. make sure the heater is cleaned out well and no debris is blocking the flue. I fthis doesn't help you can always try calling Raypak Service department at (805) 278-5300.

roll out fuse is open. for starters you have to replace that safety. then find out what caused the over temp situation. clogged venting or heat exchanger, negative down drafts, inadequate combustion/ventilation air, improper air/gas mixtures

his indicates the flame roll out safety switch is bad. This part is usually mounted right above the burner tray. It is a white ceramic piece with two wiring terminals and an external part that looks like a resistor. This part detects flame/heat coming out from the burner tray. When replacing it, be sure to check for blockage at the burner tray, heat exchanger and the flue if vented with duct work. This is a critical safety device so do not bypass it.

This indicates the flame roll out safety switch is bad. This part is usually mounted right above the burner tray. It is a white ceramic piece with two wiring terminals and an external part that looks like a resistor. This part detects flame/heat coming out from the burner tray. When replacing it, be sure to check for blockage at the burner tray, heat exchanger and the flue if vented with duct work. This is a critical safety device so do not bypass it.