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Oil mobile home furnace stops running

Our mobile home furnace is acting up. Will not stay running at first. It starts blower, 12 seconds later it fires, it burns for about 8 seconds then shuts off , throws reset switch, and has to be reset to try again. 3 or 4 tries and it stays running, as long as it doesn't have a long time in between cycles. If it sets for a while because we've turned it down at night or to go away, it starts the problem all over again. Recently changed tip. Cleaned the eye on sensor with alcohol. Doesn't run rough or anything, even when its shutting off. Seems to be burning fine, but still shuts off. reset switch is blinking single blink over & over. to reset. We use kerosene, so it's not a thick fuel problem.Another thought I've had is it seems to stay running after the fan has kicked on. By trying to start it over a few times,I guess it reaches its temperature switch and kicks the fan on. I don't know if it's a coincidence that it starts after the fan runs or if the fan is contributing to the furnace burner staying on.somehow? Any suggestions from someone who knows what they're talking about, would be greatly appreciated. Thanks!

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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Therinnaiguy
  • 1420 Answers

SOURCE: furnace won't stay running

1
1 FLASH
Furnace fails to operate.
• Integrated control module
diagnostic LED is
flashing ONE (1) flash.
• Furnace lockout due
to an excessive
number of ignition
“retries” (3 total)1.
• Failure to establish flame.
Cause may be no gas to
burners, front cover
pressure switch stuck open,
bad igniter or igniter
alignment, improper orifices,
or coated/oxidized or
improperly connected flame
sensor.
• Loss of flame after establishment.
Cause may be
interrupted gas supply, lazy
burner flames (improper gas
pressure or restriction in flue
and/or combustion air
piping), front cover pressure
switch opening, or improper
induced draft blower
performance.
• Locate and correct gas
interruption.
• Check front cover
pressure switch
operation (hose, wiring,
contact operation).
Correct if necessary.
• Replace or realign
igniter.
• Check flame sense
signal. Sand sensor if
coated and/or oxidized.
• Check flue piping for
blockage, proper
length, elbows, and
termination.
• Verify proper induced
draft blower performance.

Posted on Nov 25, 2008

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  • 252 Answers

SOURCE: sterling garage heater wont always light.

The flame sensor is dirty - have the unit serviced. Modern furnaces require regular maintenance!

Posted on Mar 12, 2009

  • 11 Answers

SOURCE: Ruud furnace Model URKA A030jK08 Code opt 589

sounds like the circuit running to your condenser powers your furnace. when u disconnect power to the furnace it will reset and run the blower on startup. check the tube connecting the vacuum switch to the induced draft motor. maybe a leak. good luck

Posted on Nov 24, 2009

Therinnaiguy
  • 1420 Answers

SOURCE: Amana Air Command 80 SSE gas furnace will not stay running

In the path of the flame on the last burner that starts, there will be a small rod. That rod is the flame sensor. Take a scrub pad and polish it. Also check the electrical connection that goes back to the circuit board. Disconnect any ground wire from the circuit board to furnace cabinet, sand it and replace it.

Posted on Mar 14, 2010

  • 5 Answers

SOURCE: Ruud Silhouette II Gas Furnace, purges, lights

Flame sensor needs to be cleaned. turn off the furnace power switch or breaker. pull the flame sensor located in the burner runner section of the furnace. It will be easy to locate because it has 1 wire running to it. pull the screw being very careful not to harm anything else. get the sensor out. inspect it for cleanliness. clean the sensor with light grade sand paper gently. re-install the sensor plug the wire back on. restart your furnace and this should fix the problem.
CookHVACR

Posted on Nov 19, 2010

Testimonial: "thanks cookhvacr, took 15 minutes and it seems to be back to normal operation."

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