Question about Heating & Cooling

1 Answer

HAVE A ARMSTRONG HEATER THE LIGHT IS FLASHING 4 TIMES PROBLEM IS HIGH LIMIT SWITCH OPEN HOW DO I CLOSE IT

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 43,501 Answers

Hi,

First thing to try is to cycle the power off for a few minutes and then back on...for some that will take them out of the lockout.

If that does not work then you will need to find the high limit switch...depending on the model, which you did not give, the high limit will be a round thermodisc that has a little red button in the center. Push the red button back in and you'll be good. The thermodisc is usually near the fan somewhere...

A few furnaces have a high limit that will not reset and will need to be replaced...Most have the type that will reset and all you have to do is reset it from the lockout...

The next thing you'll need to do is to find out why it went out in the first place.... A power outage while running will do it...or the blower motor failing...

Those are the common problems.....but an air flow restriction such as closed supply vents or a plugged air filter can also do it...

heatman101

Posted on Nov 10, 2010

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get 2 Free calls (no credit card required) and instant help on almost anything you can think of (from cars to computers, appliances, handyman, and even pets).
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Where is the high limit switch. led is flashing 4 times telling me to open the high limit switch.


There may be a couple of them. One is located over the burner and will have two wires going to it. It is usually located inside the furnace box and covered with a plate with two screws. The wiring diagram will give you the color of the wires to help locate. The other may be located on the burner and looks like a small stack of quarters with two tabs at the 9 and 3 positions. It will also have two wires going to it and may have a small reset located between the two wires. Push in on the dark red tab to reset. Check your air filter, it is the main cause for high limit to fail.

Jan 23, 2011 | Fedders F80A0703 Heater

1 Answer

Heater code is flashing HLS Open What do I need to do?


Hi,
The high limit switch either needs to be rest or replaced...the heater got too hot and tripped the high limit open...

heatman101

Jan 06, 2011 | Mr. Heater MH125KT Utility

1 Answer

I have a reznor heater in my garage, it is flashing the code for open limit switch or open flame roll out switch, it will ignite but not put out any heat, and stay lit for a minute or two then go out. ...


I have the same issue, Appears that the fan does not start thus the high temp limit switch operates and the unit shuts down and the green light flashed three times. The open flame roll out switch is resettable manually in the top upper left of my unit. Were the manual shows the high temp limit switch, there is nothing visually located in the panel there.

Dec 11, 2010 | Heating & Cooling

1 Answer

My Goodman GMP 125-4 furnace has 4 blinking lights and we currently are unable to get it to come on. What might be wrong?


if this is an error code and you mean that the light blinks 4 times then it is the limit circuit. This could mean either the high limit or a roll out switch is open. the limit switch is right in the center of the furnace above the burner and roll out switches are probably somewhere around the opening of the burner. Follow the wires from the limit to find a roll out switch cause they are in line with each other and the rool out switch could have a button to reset it. However if the roll out is not tripped then you could need to change the limit. Only way to know is to check for continuity.

Dec 04, 2010 | Goodman GDS80904BNA Open Flame Heater

1 Answer

Red light blinks 4 times, will only cycle once


the high limit is sensing the internal temprature of the furnace.If your filter is very dirty or you have to many of the registers/dampers shut it will cause the temp. of the furnace to exceed its rating and the high limit will open the circuit and shut down the flow of gas. Your blower will then run until the furnace has cooled and the switch will close and allow it to come back on. This is bad for your furnace, make sure your filter is clean and you dont have to many registers shut. If you have run the unit without a filter the problem could be much more sever requiring blower wheel and coil cleaning and possibly a cracked heat exchanger.

Sep 12, 2009 | Goodman GMS90703BXA Heater

1 Answer

High limit switch open- but only faults in night and extreme cold


Hello , I can try to help you out on this one , It sounds like what is happening is that your exhaust vented up is condensating from the heat in the pipe and the cool in the attic or wherever the exterior of the exhaust pipe travels. It is very common because your exhaust/flu pipe is not insulated.
To fix this issue you must drain the water/condensation from the small 5/16th hoses in front of the blower assembly , just pull them loose and angle them downward to drain. This should fix the problem if this is the problem.
Let me know how it turns out or if you have anymore questions. Phil

Dec 31, 2008 | Heating & Cooling

2 Answers

I have a goodman gmp075-3 and it is flashing # 4 code


There is a Primary High Limit Switch towards the middle of the furnace, it more than likely needs to be replaced, very common to go out only after a few seasons. Also, you could have a flame rollout switch tripped that will signal the same code, these switches are re-settable and are located on the outer, top and sides of the burner assembly, they’re about ½ inch in diameter with a red push button in the center and two wires “ usually purple” coming off of them.

Hope this helps

Nov 20, 2008 | Goodman GDS80904BNA Open Flame Heater

1 Answer

Electronic ignition is not working on my goodman heater


it means the high limit switch is staying open , it is there to keep the unit from over heating. it have went bad , it is the small square peice with two wires going to it on the heat exchanger could be black or brown

Nov 11, 2008 | Goodman GMS90703BXA Heater

4 Answers

High limit switch open on armstrong furnace


If you know where the high limit switch is you can always cut the two wires and wire them together causing the limit to close. But what you have to watch out for is why the high limit is not closing. That means in your return air either you have a dirty return air duct, dirty filter, or you don't have all your registors open to allow the heat to escape the heat exchanger. Just watch over riding the system. The high limit switch should either be on or behind the blower, in the middle of the system right under the heat exchanger. any other questions about hvac just ask.

David

Mar 23, 2008 | Heating & Cooling

Not finding what you are looking for?
Heating & Cooling Logo

Related Topics:

62 people viewed this question

Ask a Question

Usually answered in minutes!

Top Heating & Cooling Experts

Paul Carew

Level 3 Expert

2557 Answers

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

Donni Steen

Level 3 Expert

659 Answers

Are you a Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...