Question about Panasonic WhisperWarm FV-11VHL1 Compact Heater

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Panasonic Whisper Warm Heater Thermal cutoff. How to reactivate?

Our Panasonic Vent/Heater/Room Light/ Nitelight was professionally installed about a year ago. It has functioned flawlessly...until now. The heater was left on for apparently too long, and the thermal cutoff switch has stopped the heater from turning back on. The owner's manual is no help--it just has info on the proper installation. Is there a way to "reactivate" the switch? I see no switch inside the unit when I removed the cover, so I don't know whether the swich is designed to be replaced, like a one-time fuse.

Looking forward to an answer--the bathroom is getting COLD in the morning!

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  • urnojfk Jan 10, 2009

    I have the same problem.  Just wondering how you know it's the thermal cut-off vs the 20amp fuse that is also part of the heater unit.  My initial thought was that the fuse had blown.

  • jmpinwa May 15, 2009

    Ditto. Had it for 7 months before the heater just stopped working. Panasonic does not provide support - and they require an electrician's note before they will honor the warranty. We're about to rip the unit apart to check the thermal cutoff and the 20a fuse. Will let you know if we figure it out.

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I had the same problem and mine was cause by a blown fuse. It's not too hard to fix. Remove the cover by pulling down and squeezing the wire arms on each side. You need a VERY long screwdriver to remove the entire motor/fan/light assembly from the housing (8 screws total). Place the assembly on the floor and look for the fuse on top. The fuse is on the motor, not near the heater portion. It is a ceramic, not glass, cylindrical fuse, 20 amps, 125 volts. This fuse is sold as a microwave oven fuse & costs about 2 bucks at a hardware store. Replace, reinstall, and you're done.

Posted on May 21, 2009

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