As stated, my heat isn't coming on.

When this started: Everything has been all fine and dandy all winter. The other day I ran the fan only for a few hours without the heat. After this, my heat would no longer turn on.

I figured maybe my pilot light had gone out, so I went and checked. Turns out I have an electric pilot light.

I've done some troubleshooting already.

  • 10A round fuse on the side of the heater is good. Replaced it with new just to check that off.
  • Breaker was not flipped. Cut power and reengaged power just to check that off.
  • Thermostat can engage the furnace fan by setting it to "Fan On". Setting the heat causes it to call for heat (click noise). Heat does not come on.
  • Gas dial on inside of furnace is set to "on". I turned it to off and cut power, then reengaged everything before trying to call for heat from the thermostat just to check it off.

What am I missing here? Could something have failed while I was running the fan?

I have a Trane model BLU068L942A1. Probably from the 80's.

  • 1
    Is the electronic ignition the type that sparks? If so does it go click and lights the pilot and then stops clicking? Or is it continuously clicking?
    – Joe Fala
    Mar 9, 2019 at 3:21
  • It is never clicking. When the thermostat is set to heat, nothing happens on the heater side. Mar 9, 2019 at 3:28
  • Try to jumper the R and W at the furnace.
    – Joe Fala
    Mar 9, 2019 at 3:32
  • I'm think it's the ignition module but we gotta rule out some things.
    – Joe Fala
    Mar 9, 2019 at 3:33
  • Thanks Joe. I'll get on that tomorrow. Mar 10, 2019 at 11:15

1 Answer 1


Check to make sure that when you switched the fan switch to the on position and back off that you didn't accidentally move the system switch from heat to cool.

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