Question about 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

Also if I set the thermostat say to 72 degrees and the temperature within the house is at 69 degrees. The furnace will kick on but seems to not want to ignite. But if I raise the setting up anywhere above maybe 78-85 degrees. The furnace will ignite an throw great heat. When the house reaches the desired 72 degree mark, I must manually turn the thermostat to the off position. If I turn it back to the 72 degree mark it will of course de-ignite the furnace. But again the fan will continuously run indefinetly. running right thru the usual, brief cool down period. Until the fan itself will be the cause of the house becoming cold again. What is up with that I ask of the experts ?

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has achieved Level 3.

  • Master
  • 602 Answers

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

Posted on Nov 17, 2014


4 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Repairman can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Repairman (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

  • 306 Answers

SOURCE: Furnace doesn't reach desired temperature

One of two things you can try. Do you own a volt ohm meter? Anytime your unit cycles short like it is doing the control circuit which on this one is 24 volts that engages relays and controls the gas valve to open and close. I am thinking the heat exchanger is getting so hot it is tripping the upper limit which for the most part is around 180 degrees. So next time it turns off take your ohm meter and with the power to the whole unit off. Either turn the breaker off or there is a light switch that is real close to unit turn it off. Undo the two wires to the gas valve and ohm them out. You should have continuity if you get nothing check each limit switch should have a couple. Undo wires to them and check. If you find one that is open more then likely the upper one. They are a safety device that keeps the unit from getting too hot.

There might be another option increase the speed of your fan motor to get the heat out of furnace quicker. Look at the circuit board notice the fan wiring going to it. The Red wire from fan is low speed look to see if it is on HEAT on the board. You should have 4 speeds to pick from you could take the black off of COOL and swap wires and test the unit by doing that. I'm going to put a solution on this so I can come back to it quicker. Even though we a just testing it for now. ken

Posted on Dec 21, 2008

  • 70 Answers

SOURCE: Gas furnace continually running

Is the blower operating and are your air filters new

Posted on Jan 04, 2009

  • 2272 Answers

SOURCE: Honeywell thermostat; Lennox elite series

When the furnace exceeds the temperature set by the thermostat, this could be indicative of several issues. The thermostat mounted crooked. When a thermostat isn't level on the wall, it can affect the automatic on/off function. To fix this problem, pop the cover off of the thermostat and loosen the screws attaching it to the wall. Straighten the device and tighten the screws.

If the thermostat is level and the temperature regulation system is still malfunctioning, the problem is most likely with the heat anticipator setting. The heat anticipator is a device inside the thermostat that governs when the furnace turns off. When the heat anticipator is on the fritz the furnace doesn't receive accurate direction, resulting in a heat system that either runs too long or not long enough. Usually, simply adjusting the heat anticipator, which is a small disc located underneath the thermostat cover, will fix this problem.

  • Temperature Does Not Reach or Exceeds Setting

  1. Thermostat is not level ? Use a level to realign thermostat.
  2. Anticipator not set correctly ? Adjust the anticipator.
  3. Thermostat not calibrated ? Recalibrate line voltage or low voltage thermostat.
  4. Range stop incorrect ? Clean thermostat and check .if same problem then,Replace thermostat.
  5. To clean thermostat.
  • Kill the power at the circuit breaker panel.
  • Remove the thermostat cover.
  • Clean the bimetal coil with a soft, clean brush.
  • Remove the thermostat body by unscrewing the retaining screws (on a round thermostat). Slide a piece of bond paper between the lever and contacts to clean them.
  • Reassemble the thermostat.

  • Thanks. keep updated for any more can rate this solution and show your appreciation.

    Posted on Sep 21, 2010

    Add Your Answer

    Uploading: 0%


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



    Related Questions:

    1 Answer

    Atwood 38591 Excalibur xt 1522 LP two stage furnace. Operates on high fan only

    Hi Dave. I'm Roger. Its normal for a furnace to shut down completely when the set point on the thermostat is reached. The first and second stages are used when the temp. gets close to set point. The heat output drops to its low stage at around 3 degrees before set point. Check your owners manual for specifics on the fan though.

    Mar 14, 2014 | Atwood 38591 Excalibur XT Furnace 1522 15K...

    1 Answer


    Does the furnace stays off?.
    Furnace are ment to cycle on and off because of limits .If you set to 70 furnace would cycle several times before reaching that temperature.
    Just make sure your filters are clean and you got proper return air flow because lack of air flow will cause furnace to shut off sooner than normal

    Jun 08, 2017 | Heating & Cooling

    1 Answer

    Why does furnace fan run continuously?

    No on the thermosat go and check fan is not on the summer switch setting , if the fan is running it could be the AFC automatic fan control not shutting the fan off

    Dec 29, 2012 | Honeywell Heating & Cooling

    1 Answer

    What is a E4 code mean

    Error Code:
    E1 Loss of communication between the Single Zone LCD thermostat and the mod-ule board. LCD will cycle between E1 and the previous mode setting. System
    will shut down.
    E2 Open circuit or out of range Indoor Temperature Sensor. Heating and cooling
    operation will be locked out. Fan operation can continue to operate.
    E3 Shorted Indoor Temperature Sensor. Heating and cooling operation will be
    locked out. Fan operation can continue to operate.
    E4 Open circuit or out of range Outdoor Temperature Sensor (select models). Heat
    Pump operation will be locked out. Air Conditioner, Fan and Furnace operation
    can continue to operate.
    E5 Open circuit or out of range Freeze Sensor. Air conditioner mode of operation
    will be locked out. Furnace, heat strip, heat pump and fan mode of operation can
    continue to operate but displays the last temperature set-poi

    Dec 18, 2012 | Dometic 3313192.000 White Single Zone LCD...

    1 Answer

    Fan runs long after room reaches desired temp. heat goes off and fan continues to blow cold air, have a protech 520 thermostat

    Is your 'Heater' you are talking about-- A furnace-- with a burner and a blower?

    Either way-- We need to adjust a control that determines WHEN THE FAN RUNS--

    Most furnaces have a section where the heated air collects, and there has to be a sensor in that chamber, that senses when that air is warm enough to circulate around--- and when the burner shuts off, the air in that area cools down, and the sensor should shut off the fan-

    Can you find the Heated air area?-- and can you find a temperature control in that area?-- Can you adjust the control, so that it shuts off the fan when the air temp drops to 100- to 120 degrees F...

    Tell us more about the type of furnace/heater we are workig with, so I can better help you-

    Tell us more

    Mack B

    Jan 18, 2011 | Heating & Cooling

    1 Answer

    Furnace fires up and heats to desired heat setting and burner shuts down , but the main blower continues to run on.

    its the fan control AFC not shutting off , it comes on at temp rise say 150f drops back to 130f with fan on , burner shuts off fan runs untill temp falls to 100f the fan shuts off in this case it keeps running

    Nov 13, 2010 | Dayton Gas Furnace Heater

    1 Answer

    Furnace will not shut off after the setting is reached. have changed thermostat. Temperature reading goes down on thermostat, furnace still runs. Model : Goodman furnace,gmh95/gch9

    Check if your thermostat is set on 'o fan' setting.
    If it is, trey to set it on 'Auto-fan' instead.
    since it seem as if the heating does go off,only the fan may be running continuously.
    this is possible if the thermostat is incorrectly set or installed.
    good luck.

    Jan 30, 2010 | Goodman GMS90703BXA Heater

    2 Answers

    Draft fan keeps on running after furnace shuts

    That sounds pretty normal for most furnace/heater products. They run the heating element with fan for a cycle then after the heater reaches temperature it will shut off and the fan will continue to run to cool the element and to circulate the heat that it produced. If you want the manual for this product it looks like you can get it here:

    Oct 26, 2009 | Coleman 10' X 10' Sundome Tent 9160K101

    1 Answer

    Ruud Electric Furnace Cannot Reach Setpoint - "Watt Restrictor"?

    unfamiliar with watt restrictors.
    heat strips have 2 safety devices, a thermal overload, they get to hot they shut off, cause not enough air flow increase fan speed this device is auto reset. a fusible link a fail safe to thermal over load, no reset and sometimes replaceable. if this does not help would like to ask you a few questions. one of the buildings i take care of has 200 + reem/ ruuds all electric heat. if a part is defective replace, please do not by pass. safety frist.

    Mar 02, 2009 | Ruud UBHC Air Conditioner

    Not finding what you are looking for?
    Heating & Cooling Logo

    Related Topics:

    190 people viewed this question

    Ask a Question

    Usually answered in minutes!

    Top Heating & Cooling Experts

    Paul Carew

    Level 3 Expert

    3077 Answers

    Dan Webster
    Dan Webster

    Level 3 Expert

    8220 Answers

    Tim Whalen

    Level 3 Expert

    3074 Answers

    Are you a Heating and Cooling Expert? Answer questions, earn points and help others

    Answer questions

    Manuals & User Guides