Having problems with your Air Conditioners ?

Furnace runs about 1 minute, then total shutdown

\015 I think I know what's going on, but it is just too peculiar:\015\012\015\012I have a Honeywell 8300C 4134 gas valve.\015\012\015\012The pilot remains lit continuously, and as long as the burner does not start, everything is fine, but once the burner ignites, gas is shut off after a minute or so.\015\012\015\012Now, I believe that this is because when the burner lights, the gas delivered to the pilot drops down, allowing the thermocouple to cool and cause shutdown. If I keep the thermocouple hot, the burner runs just fine.\015\012\015\012The question is: Why did this suddenly happen? As I said, without the burner lit, pilot has a good flame. I tilted the pilot assembly a little bit to get it more into the burner flame (not too much, since there is only so much availble slop in the assembly without bending parts), and the burner stayed lit longer, but still cut out.\015\012\015\012So I think I need to understand why the pilot cuts back allowing the thermocouple to cool. I have adjusted the pilot flame, but it only affects flame size significantly when burner is off; adjusting when burner is lit does nothing.\015\012\015\012I am leaning toward replacement of the Honeywell valve. They are not cheap...\015\012\015\012thanks!\015\012\015

Answers :

What type of gas supply line do you have? Is it black pipe or copper? If it is copper, there can be a film like substance that builds up on the inside of the copper. The debris will the get caught in a pre screen where the supply enters the valve thus cutting the supply of gas to the unit. Also, the thermocouple may be bad. You didn't say that you replaced it. Try replacing it as well. Also, you could have a limit switch turning the system off and thus cutting the gas off completely but it is highly unusual for the pilot to be cut off as well unless the pilot is being blown out when the gas is shut off. Also, turn the unit to fan only without calling for heat. Using a flame of some sort, put it into each baffle of the heat exchanger. If your flame is being blown around in one of the baffles, then you have a hole in the heat exchanger and what is happening is that the roll out switch is cutting the unit off and the air still moving through the heat exchanger is blowing the pilot out. I have seen this actually happen. If your furnace is in excess of 15 years old, it does need to be checked for possible holes. If it is in excess of 25 years old, it is a huge possibility that the unit has already developed a hole. If you feel hair coming out of one of the baffles, then shut the unit down immediately and have it replaced!

Repair Help & Product Troubleshooting for Air Conditioners
You need a second opinion or clarification ? ask it in the comment box OR you can Ask Your Own Question

Tips for a great answer:

  • Please provide as much detail as possible as this will allow our members to better understand and respond to your Comment
  • If you need clarification, ask it in the comment box
  • It's 100% free, no registration required

Suggested Questions/Answers :

It is recommended you read all this kind of situations

Furnace runs about 1 minute, then total shutdown

What type of gas supply line do you have? Is it black pipe or copper? If it is copper, there can be a film like substance that builds up on the inside of the copper. The debris will the get caught in a pre screen where the supply ente ... Air Conditioners

Firing up and runnig for 2 minutes ,burners shutdown, both fans still running for 1 and a half minutes ,furnace burners fires back up , and runs for other minute and ahalf and complete the cycle .

... Air Conditioners

I have a goodman furnace and air conditioner. When the air conditioner is running, it runs for about 10-15 minutes, then shuts off for about 5 seconds, then restarts. Could you tell me what would be wrong? I think also associated with this problem, when the heat is running, the furnace will run for about an hour, then shut down, even though the temperature has not been reached. Resetting the breaker, or depressing the reset switch in the thermostat will start the furnace running again. A third p

Try running viniger through it , clean or replace filter , if filter was real dirty you may want to have your evap coil cleaned ... Air Conditioners

About to weeks ago my outside compessor and fan were not kicking on and the indoon furnace fan was running constantly i figured out were the voltage stoped and i reset the high pressure switch. the copressor kicked on right away. for about four or five days now the inside fan in the furnace runs consantly and the copressor keeps kicking on randomly as well as the copressor fan but it only stays on for 2 to 3 minutes then kicks off my thermostat never kicks off and the temp. inside my home neve

Hi,Sorry you are having trouble, with summer coming on we will need the cooling. Thank you for the details it helps a lot. I think we can safely eliminate the thermostat, the fuses, the controls from the furnace (air handler) ... Air Conditioners

Hi, I have Lennox gas furnace Model G12Q3E-82 (about 30 yrs. old). When running the A/C, I noticed there was water leaking or dampness around the bottom of the furnace. I removed the hose from the drain spout on the evaporator and noticed it was plugged and unplugged it to drain some water out of it. I also removed some water that accumulated in the bottom of the frame that wraps around the blower motor and fan wheel. I have a problem where now the blower motor runs for about 1 to 2 minutes then

Hi Todd, you did the right thing by checking the uf on the run capacitor and it is with in range , the reading is good. What is happening is with the condensation building in the pan, the blower motor has picked up some water and burned the windings. ... Air Conditioners

Our York P4HUB12N08001A furnace has an A/C unit installed and we are running it in cool mode for the summer. Yesterday, my wife noticed a repeated hum from the furnace, and the house was 4 degrees warmer than it should be. She said that it would hum a couple minutes, turn off, then repeat a little later. I told her to shut it off, and I'd look at it when I got home. With the two covers off the furnace, I returned power to it, then pressed the safety switch so I could see everything happening. Th

A fan capacitor can be bad 'without' showing any visible defects - so - I would 'First" try a new capacitor, be sure to take the old one (after you've marked the wires for easy re-wiring) and get an exact replacement.\015\012\015\012Howev ... Air Conditioners

The unit runs for 2 minutes, then stops-fan & compressor off, but indicator lights on. Frost forms on top coils before shutdown. Can power OFF, then ON after a short time, and cycle repeats itself. Mi

Sounds like a bad dual motor run capaacitor ... Air Conditioners

Have nordyne m1gb056a bw furnace will only run a minute at a time kicks on and off

... Air Conditioners

Model FC24B3XN1H. Modulating Echelon 60k btu. Fan runs constantly but no heat. Was installed 9/09. When turn thermostat off, fan still runs, have to shut off at furnace. It has never been a hot heat, installer said that is normal?? Used air couple days this week, was fine. We then turned furn off at thermostat as it was not needed. Turned heat on late yesterday afternoon & problem started. Left furn power off for about 15 minutes, but would not reset. Easy solve?? Is it supposed to be a 'cool' h

Hi,The fan running constant and the unit not firing is usually an indication that the high limit reset has tripped. And yes... these furnaces will run a cooler air... that is one way they get better efficiency...Also the ... Coleman Air Conditioners

My Ruud furnace blower motor runs and gas is ignited but after 3 seconds the burners go out. The blower still runs and it keeps trying to ignite and then goes out every minute or so.

Sounds like a dirty flame sensor, on thenopposite side of the igniter there will be a metal rod, clean this rod with steel wool ... Ruud Gas Furnace - Excellent Condition - $350 Obo

Hello, I have a Amana Air Command 80 model #GHI90A50, 22 years old. This furnace is on its third ingnition module (last one two yeras ago). The symptom I am trying to diagnose has been ongioing since this latest ignition module was installed. The furnace is short cycling, meaning it runs often once every 8minutes but for less than 3 minutes at a time. The sequence is as follows: Cycle start (small blower turns on), followed by the ignition module illuminating (yellow) for 3 seconds then turns g

If your furnace lights and the gas stays on for 8 to 10 seconds, then shuts \012right back off, then you need to clean your flame sensor with light sand paper \012or steel wool. You might need a new flame sensor, but most of the time th ... Air Conditioners

Installed a grant combi vortex 26e in January. Went back today to drain down and replace some radiator valves with leaking glands etc. When I filled and vented system, hot water fine, pump runs etc. Central heating will not fire although pump running. Pipework around boiler and by-pass very hot. No overheat. pump is free of air and spinning. I think in total I managed to get the burner to fire for on minute on central heating today. Confused. Could the by-pass be stealing all the heat? Could it

... Air Conditioners

I have a dayton fuel trimmer furnace model # 3E438A and the problem is that upon ignition to the furnace the unit runs and after about 3 minutes the units inducer fan shuts off and the flames stays on. becuz the flame stays on the flames shoot back into the unit causing the fire to burn up the wires and rollouts....why is my inducer fan cutting out?...also i notice that the contacts on the fan limit open between 5 and 6 and after this the indercer drops out while the fire stays on....its an old

It sounds to me like your draft motor is probably shuttimg off on thermal overload. They will get to hot and shut down until the motor cools down then run again.But by that time it's caused other trouble so I think you need to replace the motor first ... Air Conditioners

I have a Goodman Furnace that doesn't turn on. If I spin the blower it will run, blower just buzzes and still buzzes while running. It shuts itself off after twenty minutes. I can resets it and spin the blower and it will turn on again.

First I would suggest that you replace the start capacitor on your blower motor but if it is running for awhile that makes me wonder if the thermal overload is shutting your motor off. You can replace the start capacitor and then if it starts as it's ... Goodman CLQ24AR42 Air Conditioner

Hello, I have a Heater/Furnace problem. I have a Carrier 58RAV095-16 Natural Gas Furnace. My furnace keeps restarting it's heating process. Upon turning the heater on, a small fan will engage and run for about 60 seconds, then the fan turns off and the gas engages and the igniter clicks and you hear the gas combust and the flames spew out onto the heating rods(?) and after a minute or so, the big fan will turn on and begin circulating air throughout the house. Sounds all good so far? Well

... Air Conditioners

Our furnace runs great all day, but at night and early morning it stops. The house drops 5-6 degrees between 2am and 8am. If I try to adjust our thermostat, it will kick on and only run for 1-2 minutes (blowing warm air).

Hello\015\012Sounds like the t sat may be faulty or have a bad anticipator,usually there is a 2 to 4 degree swing before the unit will start.\015\012\015\012Also have a look at the location of the stat is it very close to anything g ... Weather King 10AJA4201AH Air Conditioner

Weather King 8PJ10NDR01 When I turn the heater switch to ON position the furnace runs what sounds like an internal fan. Second, the igniter glows and when it reaches it's hottest stage the fan thrusts air through the air ducts / vents and the burners light for about 30 seconds to a minute blowing cool air. After a period of about 30 seconds to a minute the burner turns off. After the igniter and burners repeat this about 2 times the heater shuts down by it's self, even when the temp gauge has no

The gas valve is not sensing flame, and the unit shuts down on safety.\015\012\015\012Chances are the flame sensor is bad, its a common problem.\015\012\015\012If its a thermocouple you can buy one for 10 bucks, If its a newer ... Weather King 12AJA4801AH Air Conditioner

Ruud Silhouette II furnace: comes on and runs for as long as it wants, then turns off. Sometimes turns off at pre-set temp, other times just when it wants. May turn on again, behave well for several cycles, or for 20 minutes. When I get too cold, I go out, downstairs, and thump it near the fan. Starts right up, runs for as long as it chooses. Nearly least energy-efficient kind, v. frustrating. Had trouble-shooter out a few years ago, couldn't find anything. An intermittent short?

Hi ruby. Begin by installing a new thermostat. Preferably one that allows you to program weekday and weekend temps. separately. Joe ... Ruud UBHC Air Conditioner

My coleman Evcon model DGATO70BDC 1994 starts up and then locks out. The pilot lights and then furnace runs for maybe 2-5 minutes and all that is still running is the air chamber fan. I am thinking of just replacing all parts that could be responsible the problem. There's not much there as probably you know. There is no circuit board just basic electronic ignition,relays thermo senors and etc.. Any help would greatly be appreciated. James

Does your furnace have an air flow sensor? Blowing out the lowest tube will sometimes clear it and allow your furnace to operate. Lack of differential pressure across the burner will cause a lockout. ... Air Conditioners

Furnace turns on every 5 minutes like clockwork - runs 5 mins - shuts off for 5 mins and then starts up again. That works out to 10 times an hr and 240 times every 24 hrs. I am concerned about our safety. Furnace was just installed week ago. Temperature never gets above 21degrees celcius and house feels chilly. This process does not seen reasonable.

... Sharp CV-P09FX Air Conditioner

Our furnace went into lock out and so I cycled powere and it reset it started working again but not correctly. The inducer motor wis coming on for a few minutes then the hot ignition comes on and the gas lights. then the blower comes on then shortly after the gas cycles off and then a few minutes later it cycles back on and usually the fan alternates on with the gas. I started checking the safety switches that go to hot ignition control. (24V) Once everything was running the 24V would drop to ze

Boy it sounds like a high limit opening up and shutting off the gas valve. It won't shut off the blower because it wants to cool off thge furnace. Check for any restriction in the air delivery system, filter, registers. Check for blockage of the exha ... Air Conditioners

We have anintertherm M3RL series downflow condensing furnace in our park model home. When heat is required, the furnace cycles (seems normal) and then as soon as the cycle is complete it imediately cycles again and again until the desired temperature is reached. Each cycle is only a few minutes. Seems to me that it should run until the temperature has reached the desired setting on the thermostat.

Sounds like the anticipator on the thermostat is faulty.\015\012Try replacing the thermostat. ... Intertherm Air Conditioners

Furnace runs for 15 seconds, then shuts off for 2 minutes then runs for 15 seconds shuts off etc

Check for dead animal down furnace stack ... Air Conditioners

I have a Rheem furnace rglh-10nbrjr that motor runs but flame does not light. If I turn up thermostat, the fan comes on and I hear a click after 10 or 15 seconds. I see no spark or anything from electronic ignition. Actually, do smell gas after running fan for a few minutes. Any idea what the problem could be?

Hi, you shouldn't smell any gas until the pilot flame is etablished. The sequence of operation is the small inducer motor will start on a call for heat, Then on the motor you should have a poly type tube, clear, that runs over to a pressure switch. I ... Air Conditioners

Furnace will not run complete cycle ,several clicks and the and the furnace shutdown and restarts, will not bring the house to temperature

If it's a 90%+ gas furnace, check the combustion air pvc pipe for blockage, if not enough air for proper combustion, control board will shut down the flame to keep from burning poorly! Check your air filter, there's an overtemperature safety switch ... Intertherm P3RA-048K Air Conditioner

A detailed question is important to get you a relevant answers

  • Start your question with What, Why, How, When, etc. and end with a "?"
  • Be clear and specific
all rights reserved to the respective owners || www.ad-trader.net || Terms of Use || Contact || Privacy Policy
Load time: 0.0946 seconds