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The furnace won't light. The Light on the circuit board flashes 7 times quickly

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Sounds like a limit switch is open.

Posted on Jun 27, 2016

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Posted on Jan 02, 2017

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Shad Willoughby

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SOURCE: I am getting one light flash indicator limited circuit issues. The furnace fires and heats up but blower does not come on

Wow, do not listen to that other guy.

You need to look at you're fan switch. if it is old style it has a manual override-pull that to check the blower motor.

if it is new style, basically a plate with 2 contacts-leave it hooked up and put a jumper across the terminals, blower should come on.


(The high limit codes are happening because the blower is not blowing) once you fix the blower issue that will go away.

Posted on Jan 30, 2015

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My Xenon high efficiency furnace has a red blinking led light that blinks 4 times and my furnace will not light. What could be the problem?


Gas furnace fault or error codes for common furnaces - Gray ...

www.grayfurnaceman.com/-ifc-failure-codes.html
Each color will also flash a specific number of times to signify a specific error. ... 4 redcolored flashes may be signaling that the "high-limit" switch might be open. ... 3 green colored flashes on your furnace has the same meaning as 2 green colored flashes. ....If a system problem occurs, a blinking LED shows a fault code.Missing: xenon

7 Tips and Tricks to repair your Furnace DIY - YouTube

? 13:25
https://www.youtube.com/watch?v=rAtcvPqUsBA
Dec 18, 2012 - Uploaded by JRESHOW .
Flash sequence codes 1 through 11 are as follows: LED will turn "on" ... 4 RED FLASHES: This indicates that the main limit switchhas opened ... This no-light condition occurred 3 times (2 retries) during .... My furnace trane xe80 is only flashing once my manual says something about flame being locked out ...Missing: xenon ‎efficiency

Nov 21, 2015 | Heating & Cooling

1 Answer

My gas furnace is working but the led light will not stop flashing, is it suppose to keep flashing.


A steady heartbeat on the circuit board USUALLY means normal operating condition.

Mar 29, 2015 | Heating & Cooling

1 Answer

Attic fan falure hed light blinking furnace wont run


Sounds like the circuit board needs to be replaced. The exact same thing happened on my house furnace. Power went to the board, producing the flashing led, but stopped there. I believe this is what you mean?

Replace the circuit board.

Does this help? Let us know.

Ponder/Meditate/Pray for Peace.

Mary Oliveau { hugs }

Dec 04, 2013 | Coleman Heating & Cooling

2 Answers

Whirlpool dishwasher model Gu2548XTPS7, clean light flashes 7 times and won't start.


Check, if you have water in the machine, if yes, your control board could at fault

Mar 20, 2013 | Dishwashers

1 Answer

York furnace 7 flashes


If the light flashes red 7 times, the furnace is not sensing flame. Check for a flame sensing rod (small steel rod in the path of the main burner flame). If you can see it, shut off the furnace, and clean the rod with a rag soaked in vinegar. Turn the furnace back on and see if this cures yyour fault. Make sure you turn the power off to the furnace and then back on as this will reset the circuit board.

Jan 05, 2013 | York Furnace Draft Inducer Blower Fasco #...

1 Answer

Intertherm furnace model # MMHB-070ABHR-06 red light blinks two times


Number of flashes mean different things for diff models. The meanings of those flashes should be posted somewhere on the unit; usually inside front of the bottom service panel. Though you can't truly diagnose a problem by number of flashes they can give you an idea of where to look for a problem. There are a ton of videos and how-to's about furnaces on youtube by real service techs. Most modern furnaces have basically the same set-up and features so don't worry about your paticular brand; but of course that would be the best place to start looking. You could start here to familiarize yourself with your brand of furnace:

http://www.youtube.com/results?search_query=Intertherm+Gas+Furnace+&oq=Intertherm+Gas+Furnace+&gs_l=youtube.12...62316.62316.0.63907.1.1.0.0.0.0.202.202.2-1.1.0...0.0...1ac.Ko9QBdxK6OM



And then here:


http://www.youtube.com/results?search_query=gas+furnace+won%27t+light&oq=gas+furnace+won%27t+light&gs_l=youtube-reduced.3..0.5619.10061.0.11544.11.5.0.6.6.1.741.1982.0j1j2j5-1j1.5.0...0.0...1ac.1.5-0zJyxNMEo



Hope this helps.

Dec 21, 2012 | Heating & Cooling

1 Answer

Rheem Model RGPS-12EARJR just purchased in Sept and now the furnace won't turn on. Can't find if there is a pilot light I should be starting, but even the fan doesn't go on - with or without heat


Newer, high efficiency furnaces have solid state controls and NO pilot light.
To light the gas the new furnaces use a ceramic heating element rather than a pilot light.
If the furnace isn't turning on you'll need to get a service tech to look at it for you. The circuit board has built-in diagnostics. Your furnace may have a window that lets you see the diagnostic light inside the blower box. Turn off the light in your furnace room to make it easier to see the flashing LED. See what pattern the light is flashing and look it up in your owners manual.
It's usually something simple, like no power (the light doesn't flash at all, obviously), or too much back-pressure on the exhaust line, or a faulty temperature sensor or faulty ceramic element.
I can't tell how you're trying to turn on the fan, but it could be as simple as a blown fuse or tripped circuit breaker.
There are just too many possibilities to make guesses.

Feb 01, 2011 | Heating & Cooling

1 Answer

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.

Mar 14, 2010 | Heating & Cooling

2 Answers

Tappan furnace blower will not shut off and furnace does not heat and red light is blinking one flash constantly.


Usually when the furnace blower motor runs all the time
The limit switch or rollout switch is usually open or bad.
The furnace board is seeing that one of those switches is open, so it brings the blower on to try to get the heat out of the combustion chamber area, so the switch will close. But if the switch is bad and won’t close, the furnace board will keep the blower running continuously.

Mar 12, 2010 | Heating & Cooling

1 Answer

Me too


1.Not an expert with natural gas furnaces.
2.Statements below are from my own personal experience, and knowledge from.

The red blinking light you see is on a computer control board. The flashes of the red light represent a type of code. Think of it as a Morse Code, if you will.

For example: Red light blinks three times rapidly, pause, then blinks one more time. This code represents a particular fault. (Fault = Problem)

There is a sticker, with a chart of codes listed for this red light. It is usually placed very near the red light.

A gas furnace should be repaired by a competent HVAC technician. This is not a device that should be attended to, by those who are not trained.
An HVAC technician will know where to look, what parts are needed, and if the gas furnace is safe enough to put back on line. (Safe enough to use)



Sep 12, 2009 | Rheem Paloma PTG-74PVN / RTG-74PVN...

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