• Induced draft blower pressure switch contacts sticking. I have read and heard many times over that a cracked or leaking heat exchanger can pose a threat from carbon monoxide. Thanks . No flames coming out of the area. I hope you can easily find and fix the problem. 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. • Integrated control module diagnostic LED Is flashing EIGHT <8) flashes. I have not been able to trip it and the temp rise is now within spec. This sounds like you have a flame sensing issue. • Inspect pressure switch hose. Does this make sense? I really do not know what a “Code 33” is but I am guessing it means the furnace when off on high limit. 4) After cleaning the burners, flame box, etc. I’ve found excellent advice here; thankyou! I checked the temperature rise (the furnace spec is 50-60 deg F, which is pretty narrow as I understand it) and it was measured at about 65. Once I went down this road, I realized that being recent empty nesters, I had closed off unused rooms and vents. Mini split AC systems offer a flexible way to provide cooling and heating to individual rooms. Hope you can find someone soon. • Pressure switch hose blocked, pinched or connected improperly. Any obstruction to the venting of the furnace. Place your order today! Then I would suggest cleaning the draft inducer out and make sure the hole where the pressure switch attaches to the draft inducer is unobstructed. Thought I had it fixed until we had a cold windy night. After this I reset the flame roll-out switch and turn the furnace back on. Shop our selection of ductless air conditioners available in both single-zone and multi-zone systems. No furnace operation. Required fields are marked *. I opened all the vents and rooms. •Depress Leam Button that bus BIAS and TERM dipswitches are in the ON position. I’ll have another look with your comments in mind. FIX: The control confirms these contacts are open at the beginning of each heat cycle. • ComfortNet thermostat scrolls “Check Furnace' message. If the garage unit has a blower that blows out air then I would suggest placing a couple of your fingers close to the rollout that is having problems and see if you get excessive heat around the rollout when the blower comes on. I've run into an issue on our furnace (model Nordyne G6RA120C-20) where the red light says the "pressure switch stuck closed", not open. If using the inlet pressure boss on the gas valve, 14. Steve. • Polarity of 115 or 24 volt power is reversed. • Pressure switch hose blocked pinched, a connected improperly. For example if the draft inducer is not working right it will cause a pressure switch fault. We have lots of furnace troubleshooting advice on the following page: https://arnoldservice.com/gas-electric-furnace-troubleshooting-simplified-2/ I would suggest going through the troubleshooting flow chart to see what is wrong: https://arnoldservice.com/wp-content/uploads/2014/12/furnace-troubleshooting-flow-chart.pdf We also have lots of troubleshooting questions and answers on the following page: https://arnoldservice.com/furnace-troubleshooting-questions-answers-index/ If you have any specific questions please let me know. It seems like the 185 degree switch is not as common as the higher temp switches. This can be dangerous so I would recommend getting it checked out by a professional if you can not find the problem. Would a stopped up “A” coil cause a flame roll out switch to trip or do I have a cracked heat exchanger? If your rollout switch is having to be reset please call a service company to check your furnace out. Steve. • Check flame sense signal. Take A Sneak Peak At The Movies Coming Out This Week (8/12) It’s official: Aaron Rodgers and Shailene Woodley are engaged and we couldn’t be happier Rollout switches are safety controls and this could be telling you the furnace is unsafe to operate and needs to be repaired. This sounds like you are having an air flow problem. A dirty filter prevents a flow of fresh, cool air into the furnace to be heated and dispersed. So between the wasp nests and the empty nest, I hope I got it. If your pressure switch is acting up too. If the furnace is burning up rollout switches then more than likely you have a heat exchanger leak and you might need a new furnace. • Furnace fails to operate • Integrated control module LED display provides EO erra code. Once I realized the unit would continue to run with the flame box lid off, I watched the flame as I took the lid off and on. Hi Brian! They worked well for the first few years. Same thing occurs. • Shorts in pressure switch circuit wiring. Steve. Could it be too hot, and should I turn back the gas? Hi Steve! - Manual disconnect switch off or door switch open. My issue is that the limit switch trips after the cycle is complete, never during (furnace always gets up to thermostat temp). - Moisture present in motor or control module. Paul G. Celentano, homeowner and amateur furnace technician. Cause may be no gas to burners, front cover pressure switch stuck open, bad igniter a igniter alignment improper aifices, a coatedfoxidized a improperly connected flame sensa. Steve, My old gas furnace (Armstrong G78-100D) does not continue running. High Pressure Switch Open: High - pressure switch trip. If a blower motor is not working it can cause the furnace to go off on limit and the air conditioner coil to freeze up. Do I test the switches while the furnace is running? • Induced draft blower and circulation blower runs continuously. The reason core doesn’t require the stove to have a limit switch is because someone has to physically walk over there and turn the thing on, therefore it is assumed that said person will be responsible enough to shut it back off when they are done cooking or if a CO alarm were to go off. I would strongly suggest that you have a professional take a look at your furnace to make sure it is safe to operate. Of course, this would create an obstruction in the vent and cause the problem you are having. You can test to see if the rollout is closed by using a voltmeter set to “Volts AC”. Now, I am wondering if the wind had anything to do with it. •Integrated control module diagnostic LED is flashing TWO (2) flashes. This could be caused by a partially stopped up vent system, heat ex-changer or a leak in your heat ex-changer. On some of the older furnaces, the time the blower stays on is controlled by a mechanical control which can be adjusted to make the blower run longer. • Check drain system. The unit fired right up. It occasionally happens despite the quality and Goodman brand isn’t an exception. My current working hypothesis is that the thermal switch is just getting hot because the furnace is too hot. Your furnace does sound like it probably has a heat exchanger leak since the heat is causing the rollout to trip. Thanks for putting the forum together. Though if you know the answer to the venting length question, I would appreciate letting me know for future reference. The numbers on my switch are: 36TX26 L185F 6914 37520? It is the bad burn that causes the build-up of carbon monoxide. Steve. If your thermostat uses batteries make sure the batteries are in good condition. Carect speed a replace blower motor if necessary. I noticed this with my furnace too. If you do not then the rollout is open and needs to be reset or replaced. Steve. Hi Mark! The furnace came on, the technician left within 10 minutes and the furnace stopped again. Steve, Hello I’m having a problem with my gas furnace, model #54192110. - Check to be sure control switch or knob on gas valve is in ON position. Steve, My heil furnace ignites for a few seconds and as soon as the igniter goes off the burners stop lighting. Also, if you have not already make sure that the draft inducer is securely tightened to the body of the furnace so you are not getting any air leaks. Hi Mark! • Furnace fails to operate. The fan motor turns on with 3 burners, runs for a few seconds, then shuts motor and burners off. Have a blessed Thanksgiving! One thing I noticed was that the furnace filter doesn’t sit all the way in the slot. 4 Blinks – Pressure switch stuck closed. Again, it just doesn’t contain a rollout or limit switch because the operator acts as the limit. We offer same-day shipping on most products, so you won’t have to do without the goods you need for long. You can see if the pressure switch is actually bad or stuck closed by disconnecting the two wires that go into the pressure switch with the furnace power switch on so that the control board senses the pressure switch … Hi Cwhazz! You probably either have a stopped up heat exchanger or a cracked heat exchanger. Maybe, once every other week or so. I would suggest testing the safety controls to make sure they are all closed. I hope you can easily find and fix the problem. I hope he finds a simple fix and not a new heat exchanger or furnace. They presume whoever turned it on will turn it off before any levels become dangerous. This would indicate a faulty pressure switch or miswiring. Make sure they are staying closed when the furnace goes out. I hope you do not have a cracked heat exchanger. Closed … At RepairClinic, we offer genuine, OEM small engine parts to all of the major small engine brands including Briggs & Stratton, Craftsman, Cub Cadet, Honda, Husqvarna, Kawasaki, Kohler, and MTD.We help customers locate the repair parts they need by mapping parts to model numbers. - Moisture present in motor/control module. • Primary or auxiliary limit circuit Is open. This sounds like your furnace blower is not running long enough after the gas shuts off to expel all of the heat out of the heat exchanger. Sorry, you have the expense of a new furnace this time of year. Below we have a picture of two limits and one rollout switch. I hope that you and your family have a great and blessed Thanksgiving as well! Touch one terminal of the rollout with one meter lead and then touch the other meter lead to a good ground. Sorry for the bad news. We also have another really good YouTube video made by AC Service Tech LLC that explains how to test and troubleshoot rollouts and limit switches. If you feel any heat coming out of the front of the furnace or if your rollout switches are going off then I would suggest calling a service company to make sure your furnace is safe. I thought maybe it could be the thermostat because it is a very old furnace, so I was thinking if I changed the thermostat it might help problem. Service tech for many years. Hi Mr. Smith! A weak capacitor will cause a fan motor to run slow. Operate furnace with burners firing for approximately ten 5. What nobody has been able to explain yet is why that is a problem when the exact same natural gas is used completely out in the open every morning and night in our kitchen? Thank you so very much for your Thanksgiving blessings! I am having a problem with my roll out switch and I replaced it and the furnace ran for about 10 or 15 minute and the second led light started blink three times again. • Insufficient conditioned air over the heat exchanger. I just had a warranty company send a guy out to replace the gas valve on my Carrier furnace. I hope you can easily and inexpensively find and fix the problem. Thank you. • Blocked flue and/br inlet air pipe, blocked drain system a weak induced draft blower. It and you are helpful. Turn outlet pressure test screw in to seal pressure port hose barb fitting must be installed prior to making the hose (clockwise, 7 in-lb minimum). If the furnace limit or rollout switch senses that over-heating occurs then it trips the rollout switch to prevent an unsafe over-heating condition. The technician is “working” but doesn’t know how to fix. The roll out switch was corroded and wasnt able to be reset. The push-button manual set rollout switch is located in the middle. Changed the high pressure switch and it still is blowing cold air. •Integrated control module diagnostic LED Is flashing THREE (3) flashes. I hope you have a great and blessed day! Steve. •Incorrect pressure switch setpolnt or malfunctioning switch contacts. I really doubt there a heat exchanger issue, the flames look perfect. Had dirty filter so changed air filter. Ok, I just posted a question and then saw this. That is a very good question. Some of the control boards have dip switch on the board where you can adjust the fan run time by adjusting the dip switches. No sir the filter hanging out 2 inches should not cause the furnace to over-heat. I have a Goodman propane furnace (installed in the attic) over 23 years ago. How would I find the spec for the required switch? If any water is building up in the secondary heat exchanger it can partially block the vent and cause the furnace rollout to trip. This erratic operation usually points to a relay on the control board not making good contact all the time. And if the furnace kicks on it does not ignite now the igniter does glow but nothing happens after that. Steve. Your email address will not be published. You should never have to reset a roll out switch unless there is a problem with the furnace. I would like to suggest that you make sure that your pilot is clean and all wires, ground wires, and connections are good and tight. Different areas of the furnace are allowed different heat measurements before they are determined to be safe or unsafe. Logically you’d just have the blower run longer than the 30 seconds it does now after the heating cycle is done. The flame still looks good (nothing impinging on the flame box) when the second stage comes on and I can hear the blower and draft inducer speed up. Hi William! What it means: Code 31 typically indicates a problem with the high pressure switch. Hi George! If you have any other questions please let me know. I hope you can easily find and fix this problem. When the second stage was running, it would eventually trip the rollout switch. • Circulator blower runs continuously. Thanks for your response. I doubt it since the flames look good and stable and it would take a lot of consistent wind to get that flame box hotter than it should be. Real easy on a natural draft furnace as compared to a high effect unit to check be careful what you tell people. Switch will not open. • Check circulator blower speed and performance. Thank you so very much for your correspondence! When you cleaned the outdoor coil maybe you moved the thermostat wires around a little and if the thermostat wires had sun-exposed dried out insulation then maybe the wires have shorted out. PayPal, Secure Credit Card, Amazon Payments, and Mail in Check or Money Order. Single family cape 1850 sq ft, 4 bed 2 bath, oil heat boiler, hydronic baseboards, indirect fired DHW tank, closed system because of Pressure Reduction Valve near main street meter, 70 gal with priority call, set to 125°F, main supply metered from street (100psi), Pressure Reduce Valve after … Hi David! You can test the rollout either with or without the furnace set for heating to be on or off. The roll out switch has to be replaced every year. I’ve got the same furnace and same age roughly. - It is normal for motor to oscillate with no load on shaft. So sorry to hear that you are still having problems! Last but not least make sure your furnace filter is clean and you do not have a filter that is too restrictive (blocks too much airflow). Loren, Hi Loren! Furnace Filter Problems | Effects of a Clogged HVAC Air Filter. I go over this problem in more detail on the following page: https://arnoldservice.com/problem-i-replaced-my-rollout-switch-and-the-furnace-still-goes-out-after-running-12-hour/ I hope you do not need a new furnace. Steve. I hope that you do not need a new heat exhanger or furnace! If you have any other questions please feel free to email us: support@arnoldservice.com or comment in our comments section below. Does this indicate control board? • Check flue piping fan blockage, proper length, elbows, and termination. This can be dangerous. Please make sure that the heaters are going off when the thermostat is calling for no-heat. Trying. But before I call them again for this next problem, I wanted to see if hanging that gas valve (and subsequently not adjusting it properly) would cause a Code 33, or the rollout/limit sensors to trip? Steve. - "Hunts" or "puffs' at high CFM (speed). • Induced draft blower runs continuously with no further furnace operation. • Low stage pressure switch contacts sticking. We really appreciate your time! If you are not getting 24 volts between R and C then you probably have a low voltage transformer problem. 3) Checked the gas input rate since the gas company had been installing new lines in the areas and it was with spec. I had one install where I had too many 90 degree bends and the pressure switch started going off with a pressure switch error code. I would think it would be the total sum of both when looking at the table. • Integrated control module LED display provides E2 erra code. The only thing that I did not see that you did not do yet would be to make sure that the furnace’s condensate drain is clean. So sorry to hear that David! God bless you too! •Integrated control module diagnostic LED Is flashing THREE (3) flashes. Steve. I would suggest making sure the belt is tensioned correctly so you get good air flow. - "Hunts" or "puffs" at high CFM (speed). • Induced draft blower runs continuously with no further furnace operation. If you do feel more heat when the blower starts then I would think that you have a heat exchanger leak. The relay switch keeps popping out, I go down and hold it for 30seconds then it comes back on.
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