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I have a Rheem RGPN 12EARJR that tripped the high limit safety switch. There was an air restriction that was the source of the problem. Where is the reset?

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Posted on Jan 02, 2017

  • 173 Answers

SOURCE: furnace

It's always possible that the limit "dial" switch is sticking leading you to believe that it's only at 150º.

How old is the furnace and when was it last cleaned.

Posted on Dec 12, 2007

  • 5 Answers

SOURCE: 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.


Posted on Jan 17, 2009

  • 233 Answers

SOURCE: high pressure switch keeps popping out

generally this means that the condenser coil need to be cleaned.

Posted on Aug 15, 2009

  • 74 Answers

SOURCE: i have a tempstar combine air conditioner and

If the unit is around 6 years old then it could be the combustion air motor. If the unit is older then you need to inspect the heat exchanger for signs of cracks. Take the top off the unit to inspect. Check to see if the metal around the reset is hot and if it is then the switch is doing it's job. If the heat chamber is cracked then turn the gas off, because your home will have CO. This can kill you.

Posted on Jan 05, 2010

  • 1015 Answers

SOURCE: I have a rheem gas

Depending on the age of your furnace the limit swithes are part of the control board and are not individually serviced. You will need to replace control board. On the older units that used a seperate fan and limit the only thing you could do was change temperature settings. Hope this helps. Thanks

Posted on Nov 19, 2010

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1 Answer

Why does high limit switch keep blowing?

Check for lint build up inside the machine, especially around the air exit duct as any restrictions can cause the machine to build up heat higher than normal. The high limit safety is a fire preventative device.

Nov 15, 2015 | LG Dle2301r Front Load Dryer dle2301r

1 Answer

Our Rheem Classic Air Conditioner Unit keeps tripping the reset button or something and we have to run out and trip it. Well today it won't turn back on.

What's probably happened is that your outdoor unit has overheated due to a high pressure/high temp situation. The reset button at the base of the o.d. unit is a HIGH PRESSURE RESET. This safety is factory installed to prevent the unit from operating under an excessive(per design) pressure.
•The o.d. coil needs to be cleaned
•The o.d. fan motor needs to be replaced
•The run capacitor(s) at the o.d. unit need to be replaced
•There is a restriction in the refrigerant cycle
Its also possible that a component has faulted, along with a high pressure issue. 1 problem can cause another. The reset opening sometimes let's us know something is wrong and its time to repair the problem before it gets worse. Its hard to say what to do now. If it was still opening the pressure switch you could try washing the o.d. coil. Call a tech!

Jun 23, 2015 | Heating & Cooling

1 Answer

Can you run your heater without a roll out switch?

The roll out switch is a safety switch. It is there for safety. The purpose of the switch is to cut the gas off if there is flame or excessive heat low in the heater as found when the heat cant exscape out the top. Many reasons for a roll out failure if you are tripping the roll out it is always a symptom of a larger problem.
Low gas pressure or lack of combustable air causes soot in the heater like that of a chimney. This will restrict the air flow through the heater. A spider web in the gas oriface or burner can cause a roll out flame to hit the roll out fuse. Indoor applications can easily be an issue with the exaust venting or fresh air supply. Outdoor applications it could be a wind down draft through the heater. Whatever the reason it is tripping the roll out fuse, by bypassing it you are allowing the gas and burn to continue in an unsafe condition which mean larger problems will arise possibly even the heater catching fire.

Jun 24, 2014 | Rheem Pool & Spa

1 Answer

Goodman furnace

Sounds like the furnace is tripping off on a limit safety, either temperature or air switch. Check filters and restrictions to air flow (furniture over return air grills, blocked filters) also, check the drainage line of the system. If the furnace can't drain water fast enough it will back up internally, and trip the system off on a pressure switch safety.

hope this helps.

Mar 18, 2014 | Heating & Cooling

1 Answer

Rheem split system condenser high pressure limit/safety needs resetting frequently before it reaches the set temp of 76 degrees faren. what's wrong and what do i need to check?

Is the outdoor fan running? The fan cools the coils and compressor, therefore keeping the high pressure low enough to run. Either the fan is not working or its not spinning fast enough. Check the capacitor, or just replace it.

Apr 18, 2017 | Heating & Cooling

1 Answer

Intertherm model# FEH-015HA It is no longer blowing heat

High limit safety device is probably tripped, it should reset automatically, also check other safety's for tripped condition, they look like small round device located in a variety locations through out the unit with two wires to each one, some have small push button resets located in the burner compartment area. If all the safety's are reset and check out OK the main control board may need replaced. One of the most common causes of high limit safety device trip is lack of air flow, Dirty filters, evaporator coils, malfunctioning blowers, closed supply air registers etc.
Note: High limit safety switches also go bad after being tripped to many times.

Nov 28, 2011 | Heating & Cooling

1 Answer

I have power to my dryer but when pushing the start button nothing happens

All dryers have a door switch, perhaps yours has failed. If that turns out to be fine look for air restrictions that would cause overheating. If you see some then be aware one or more of the safety's on your dryer may have tripped to prevent a dryer fire. The most obvious safety to look fo is the thermal limit mounted on the blower housing or very near where air can be quickly judged to be in excess of 350f. A dryer should never get above 160f.A high limit is mounted on the heater element if the temp rises above 250f another is mounted on the opposite end and rated for 300f. If the filter area is completely blocked the air inside the drum will rapidly exceed 350f and the thermal limit will melt. These are your safety's. A simple $10 ohm meter can help you verify which safety is blown. Unplug the dryer and set the meter to read ohms. Remove a wire and check for continuity between the safety terminals. If you can't see the needle move (on analog meter) Or get an audible beep (On digital models) then you know you have found the problem.

More Here

May 22, 2011 | Dryers

1 Answer

I have a Rheem heat pump and a Honeywell thermostat. I let my air filters get too dirty, and they restricted the air flow so the system shut off. I have replaced the air filters but the upstairs doesn't...

You may need to replace the furances high limit switch. This is located abvove the burrners with the top frot door off. It has two wires going into it. The furance probably was cycling on this switch which automatically resets it self. The thermal dics wears out and starts to trip at lower temperatures. You can temporally jump across the switch and check the furances opreration but do not leave this switch jumperd because it is a safty.

Feb 06, 2011 | Honeywell Heating & Cooling

1 Answer

I have a thin twin stacking whirlpool washer/dryer. The high limit switch is kicking off the element within 2 mins of running. So heating element heats up red hot, then clicks off after 2 mins. I have...

I think you are on the right track with a faulty high limit switch. When i serviced these units we always replaced the operating thermostat and the high limit switch together they came in a kit. The operating thermostat in theory should never let it get hot enough to trip the high limit switch, which is really just a safety backup for the operating thermostat. Get the kit and replace both, and also make sure your exhaust vent going outside has good flow at the outside vent,a restricted vent system will cause similar issues.. Good Luck

Oct 07, 2010 | Whirlpool LTE6234D Top Load Stacked...

1 Answer

Rheem gas furnace blower unit not working properly

look at circuit board and follow wires that come from fan motor, if this is a standard motor black is high and it will be going to a prong that says cool, red is low and it will go to heat, you will have a yellow and a blue that are "parked" remove red park it were the blue is and put blue on heat, if this is a variable speed motor you will have to set dip switches via your equipment manual

Sep 29, 2009 | Heating & Cooling

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