Question about Air Conditioners

1 Answer

Armstrong v tech 91 furnace. will not make heat. when on unit runs continuosly no matter what thermistat is set at. could mother board be bad,replaced once already. cah this be done by the home owner to save the inflated cost of a repair company coming out. thanks donny

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Prodigy:

    An expert who has answered 500 questions.

  • Expert
  • 540 Answers

These furnaces goes thru 4--steps for complete run time.... step-1, the small draft inducer blower motor blows and prove thru the small air tube that sucks a switch close to tell the circuit board to go to step-2......the glow plug glows for 15 seconds and step 3 the gas valve opens and dump gas in the venturi tubes and lights off the glow plug and proves thru a flame sensor (pin with 1 electrical wire connection) on the last venturi tube which tells the circuit board to go to the last step 4--, to turn on the main blower fan after 90 seconds!. Where ever it stops at then thats where your problem is!

Posted on Sep 13, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Armstrong furnace goes off while heating


most likely a flame sensor rod, is there a board with a red flasing light after it goes out?
if so count the flash code and refer to labels on doors for what the fault is.

Oct 07, 2012 | Air Conditioners

1 Answer

Armstrong furnace won't stop running


Hello, sounds like the relay on the intergrated control board is sticking. This will require the board to be replaced.

May 07, 2012 | Air Conditioners

1 Answer

Armstrong furnace G1D91AU075D12B shuts off before thermostat setpoint ex. if thermostat is set to 70, furnace shuts off at 65 you can then turn stat off and back on and unit will start up again. since...


If your heat anticipator in the thermostat is bad or set at the wrong amperage, it could do just as you describe. If the air filter is dirty or the ducts are restricted, the furnace could shut down on high limit. I would check the air filter and replace if necessary. Make sure all registers are fully open and last, change the thermostat.

Jan 08, 2011 | Air Conditioners

1 Answer

Hi, My parents have an Armstrong Furnace Ultra V Tech 80 Model #G1N80AR100014B-2A. I am a building engineer with service exp. and have also had a service tech. out. After much research here is my...


You can check the flame sensor with a microamp meter to see if the flame sensor is good unhook the wire going to the flame sensor put one wire lead of microamp meter in the wire and connect the other wire from the microamp meter to the flame sensor the turn on the furnace for a cll for heat if you get less than .9 microamps replace the sensor.

Mar 08, 2010 | Air Conditioners

1 Answer

Armstrong 4PHP13E36P runs after heating element cools


There may be pins on the circuit board inside the air handler that you can adjust. First turn off the breaker then look inside at the board. They may say 30-45-60-90 etc. Put the pin on a lower number. Do you have a digital or programmable T-stat? There may be a setting in the T-stat setup program that allows for blower delay also. consult you installation instructions. Last if the blower isn't turning off at all then the relay on the circuit board is stuck closed and should be replaced.

Mar 10, 2009 | Air Conditioners

2 Answers

Furnace runs on heat, air conditioner does not


If you have a Gas furnace in the Attic then the answer is yes. The outside condenser will not run if in fact you have a gas furnace.

Feb 11, 2009 | Ruud Central System Air Conditioner

2 Answers

Carrier electric furnace


what are you talking about. Turn the thermostat back up. It shouldn't matter what you set the thermostat too because it is just a switch that tells the temperature.

Jan 16, 2009 | Carrier 38CKC042 Air Conditioner

2 Answers

Furnace doesn't reach desired temperature


On the thermostat if its a manual on then pop the cover off and look for a small dial with numbers on it. Take and move it tpoi a higher number than whats it is set at. Its called a heat anticipater and is supppose to make it so that the unit does not oveshoot or under shoot like what your experiencing. If its a digital oine then you are going to have to configure the setting in the insdtallers menu.

Dec 21, 2008 | Air Conditioners

1 Answer

Armstrong air tech 91 furnace problem


Sounds like the flue is plugged, I had same problem and opened up the draft fan and there was a dead bird restricting the flue. Furnace will never light if the pressure switch never closes as you have found out. Also has anyone moved the switch some are position sensitive meaning have to be in same position factory set the switch. I had one like that also switch was little crooked so I straighten it up and walla worked.

Nov 23, 2008 | Air Conditioners

Not finding what you are looking for?
Air Conditioners Logo

Related Topics:

257 people viewed this question

Ask a Question

Usually answered in minutes!

Top Air Conditioners Experts

Dan Webster
Dan Webster

Level 3 Expert

8147 Answers

Bill Long

Level 3 Expert

577 Answers

Tim Whalen

Level 3 Expert

3056 Answers

Are you an Air Conditioner Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...