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Carrier 58gp100 2

The house desired temperature is reached but the system will repeatedly light the burner with no fan

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  • Contributor
  • 27 Answers

Remove the thermostat from the system (just remove the R wire from the circuit board in the FAU) and see if the problem continues. If it doesn't fix it, the circuit board on the furnace should be replaced (something would be seriously wrong with the controls). If the problem stops and you have a nest thermostat (they do this kind of thing often) talk to Nest customer support, they have a solution using a capacitor. If you dont have a nest, replace your current thermostat as it would be faulty.

Posted on Apr 11, 2014

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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,
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Posted on Jan 02, 2017

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tborn6
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SOURCE: fan cycles on and off to often the burner stays on and the fan cy

what is happening is that the heat exchanger has to get to a certain temperature before the fan comes on that way you have warm air blowing out of the grilles and when the heat excahnger gets cool it shuts off until it warms back up again.

Posted on Jan 25, 2009

  • 34 Answers

SOURCE: once temperature is reached the burner still trys

Need a thermocouple it sounds like to me.

Posted on Apr 17, 2009

SOURCE: Noisy pilot light Vulcan Quasar 40

Simply clean out the jet tube with a fine wire, the sound you hear is the gas blowing by the irregular edges, and swirling and not mixing and producing sound waves, (Bit like a flute) So, you need to clean the tube right out, and smooth off the end again, & sorta "Countersink", Flame the end too, at the end.use a very fine needle file, and make it look like new, that will sort your problem out. Then adjust so you have a good gas flow. Also check out it isn't blocked too.

Posted on Apr 30, 2010

  • 2 Answers

SOURCE: I have a Dyna-Glo unvented

MAKE SURE THERE IS AMPLE FRESH AIR IN THE ROOM, SOME MODELS ARE MADE TO NOT LIGHT IF THERE IS NOT ENOUGH FRESH AIR. RON G.

Posted on Dec 01, 2010

  • 1 Answer

SOURCE: I just bought a Honeywell RTH2300B and installed

New furnace and new thermostat. The new thermostat is digital and it will not go above 67. It's a Honeywell RTH2300.

Posted on Dec 29, 2010

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1 Answer

My pilot stays on on my propane furnace but will not light up


The Little Giant units use a Unitrol gas valve very similar to a water heater in the home. #1,urn the Unitrol gas valve to the "PILOT" position to ignite the pilot. Depress the plunger and hold it down then push the spark igniter button until you can see the pilot flame ignite.
You have a lit pilot so this is not a problem for you.
The pilot light stays on continuously by design.
Once the pilot flame is established, you then turn the on/off/pilot valve to the "ON" position and set the thermostat to the desired temperature range., it should then fire its main burner until the desired temperature is reached. Once the temperature is reached, the main burner will shut off and the heater will go into a standby mode with the pilot flame still burning.
If you have turned the pilot valve to on and set the temperature high, it should come on, if not a new gas valve is required, they can be very difficult to replace due to rust.and most cases require a new unit,

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1 Answer

Fan cycles after burner stops


When your furnace has reached desired temperature the burners will turn off but your fan will continue to blow for a couple of minutes Or in other words until it cools your fan limit switch. This switcheck is what tells your blower motor when to kick on and when to kick off.

Mar 06, 2015 | Heating & Cooling

1 Answer

I have a Braeburn 3200 and when the the temperature reaches the desired heat setting. The furnaces heat will shut off, but the fan will continue to run indefinetly. eventually blowing very cold air up


The fan relay is stuck in the on position. When the temperature drops the heater does not ignite because the fan is already running and ignition is locked out after the heat cycle starts an the fan turns on

Nov 16, 2014 | Heating & Cooling

1 Answer

After oven reaches desired temperature, it has late ignition that turns off the pilot AND OVEN WILL NOT STAY ON.


Sounds like the pilot is mounted to far away from the burner. I have seen it happen before where the pilot has detached and the main burner will just keep pumping gas in until it hits the pilot flame and just flash flames and everything goes out.

Or it just could be a bad thermocouple that is going out all the time.

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My goodman furnacs says my limit switch is bad blower works but does not ignite .....? its modle gmt070-3 and where is it located


There are several limit switches in the unit there in various places in burner compartment. One on blower housing . One thing that I would try is replaceing your filter and turn the power off to the furnace and try starting the system after power is D/C for 5 minutes.

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1 Answer

My Carrier LP furnace is cycling when zone 2 has two degree temperature difference. The system goes thru the start up process, lights the burner, starts the house fan, and then dies with an Event Message...


Your furnace has a minimum airflow required to keep the heat exchanger within the correct temperature range. Depending on the model, either your ECM fan motor circuitry is detecting inadequate airflow at high pressure, or the heat exchanger temp sensor is reading high.

Some zone systems have a "bypass damper" setup. This is a damper in a duct that connects from the supply plenum back to the return. It opens when smaller zones are running so the system fan can keep enough air moving through the exchanger.

Your bypass damper may be stuck or disconnected. Or, setup on your Carrier zone board may not have been done correctly. Another possibility is that your system turns out to need a bypass damper and your contractor didn't realize it and hadn't installed one.

If it used to work and this is a new problem, another possibility is your filter is not permitting enough airflow; or did you recently modify any ductwork that could have inadvertently restricted the airflow, even on the return side?

Last, verify that the Zone 2 damper opens fully when the call from that zone happens.

Good luck!

Dec 16, 2010 | Heating & Cooling

1 Answer

I have a central air and heat heat uses gas so when the heat is on should the main fan be turning


Typical systems are designed with a thermostatic "fan limit switch" which protrudes into the heater (house air portion of the passages). The "fan limit switch" is mounted to, and protrudes into the duct within the burner section of the heater, near the heated metal.

This switch triggers the circulating fan to turn on only after the sensor (thus air) within the duct has reached well above ambient temperature. This design prevents the fan from coming on sooner and the system blowing cold air, which people don't like.

Depending on system design, installation and current operating conditions, the time delay from main burners on to fan on can be up to a couple of minutes.

This same limit switch, if the temperature goes high enough, will also turn the gas valve off; a fire safety function.

Jan 06, 2010 | Goodman CKL49AR49 Air Conditioner

1 Answer

Air condtioning unit


check capicitor on motor, fan motor bearings may be locking up when they get hot then when cooled the motor comes back on. Then you must replace fan motor.

Aug 11, 2009 | Heating & Cooling

1 Answer

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...


The gas valve is not sensing flame, and the unit shuts down on safety.

Chances are the flame sensor is bad, its a common problem.

If its a thermocouple you can buy one for 10 bucks, If its a newer style they can usually be had for less than 30.

They are easy to replace ad they are usually installed with two screws and one to two wires.

They sit directly in the flame pattern in front of the burners.

A service call should only cost you 250 or less for the repair, but you can do it yourself for less than 50 (including gas to drive to the HVAC supply house that sells your brand unit.)

You will need the model and serial #s when locating the parts.

Dec 27, 2008 | Weather King 12AJA4801AH Air Conditioner

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