Question about Goodman CLJ30AR32 Air Conditioner

1 Answer

Goodman GMP125-5 limit switch open

I have a Goodman Furnace GMP125-5. The circuit board indicated an open limit switch (4 blinks), either main or aux. How does one check the limit switches and where are they found? How does one fix the problem?

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 144 Answers

There may be as many as 6 limit switches on the furnace. The first thing to do is turn off the power to the furnace. Look around the burner box. You will see possibly 3 small maybe brown plastic swithes with two wires to each and a button between the wires. Press the button on each one. If it clicks that's the one tripped. There may also be the same kind of switch(s) in the blower compartment. There's a self resetting limit on the middle of the furnace it also has two wires but looks like a black or dark brown plate about 2 1/2 X 3 1/2 inches. You have to check that one with an ohm meter. If any of these switches are tripped there is a reason. Check your filter and overall air flow. with low airflow the furnace may overheat. The switches around the burner box are roll out switches. Watch to see if flames are coming out of the burner area. especially when the blower comes on. DO NOT bypass any of these switches. Call a certified tech. to check it out.

Posted on Mar 02, 2009

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Open rollout or open fuse on Goodman

the fuse is located in the circuit board in the blower compartment and the roll-out is located in the burner section and can be a reset-able switch style or the one time fuse link style which is a a small silver cylinder and is mounted in a ceramic piece and is held in with one screw. Both of these are mounted around the opening of the your burner assembly near the opening. This will be near the area of the gas valve.

Sep 24, 2012 | Goodman Manufacturing Goodman R410A 13...

1 Answer

Furnace blinks 4 times indicating limit switch

Hello, a limit switch can open for several reasons, this could be due to dirty air filter, dirty blower wheel, blower motor not running at proper speed. Anything that cuts down on the airflow and causes tne heat exchanger to get way to hot will cause the limit switch to open.

Apr 16, 2011 | Air Conditioners

1 Answer

My goodman furnace, model number GDS80703AXBB has a red light bllinking 4 times and the panel says it means open high limit... how do i fix this?

Hello, a limit switch will open when the furnace gets too hot, the switch senses that the temperature is too hot and shut down the furnace for safety. Uusally a limit switch will open because of lack of airflow across the heat exchanger, this could be due to a dirty air filter, dirty blower wheel, or the blower motor itself is not running at the proper speed. I hope this helps.

Feb 16, 2011 | Air Conditioners

1 Answer

I Have a beige goodman furnace (old ones) gmp... i replaced the circuit worked fine..then once it reached its desire temprature from thermostat.. fire goes out then 2 min following is the...

Check the pleum high limit switch. Jump this control out and see if the furance runs until the call for heat is satified. Do mot leave the high limit jumperd.

Jan 26, 2011 | Goodman CACF048B2A Air Conditioner

1 Answer

I have a GPG13 unit that is locking out on the aux limit switch. Can I increase the post timer for the bnlower. The blower compartment stays too hot after shut down and causes the aux limit to shut off.

You should be able to adjust the Blower off time by way of Dip switches on the circuit board...these are typically and band of tiny switches on a red block . Is the furnace new??? You may also increase the speed of the blower by using "High" speed which is the same as the AC speed...heat typically uses Medium...also make sure your filter is Clean and yoiur retun air vents are open and not obstructed

Oct 25, 2009 | Air Conditioners

1 Answer

Goodman forced air gas furnace not firing

if your power vent moter is not running you should not have have glowing ignitor.Frist the vent moter must close an air prove switch in series with the idnitor .seems you have a stuck air prove switch.Its the one with a hose attached

Apr 04, 2009 | Air Conditioners

1 Answer


the pressure switch is closed before the draft motor closes it.the board is telling you that this is not right.pull the wire(either) off of the pressure switch to see if furnace tries to light.if it does,you should replace the pressure switch.

Oct 02, 2008 | Goodman Air Conditioners

1 Answer

Goodman GMP125 - 5

it could be a broken wire or bad control board.A popped roll out switch could cause this also

Aug 06, 2008 | Goodman Air Conditioners

Not finding what you are looking for?
Goodman CLJ30AR32 Air Conditioner Logo

557 people viewed this question

Ask a Question

Usually answered in minutes!

Top Goodman Air Conditioners Experts

Brandon Berry
Brandon Berry

Level 2 Expert

407 Answers

Dan Webster
Dan Webster

Level 3 Expert

8147 Answers

Tim Whalen

Level 3 Expert

3056 Answers

Are you a Goodman Air Conditioner Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides