Question about Heating & Cooling

1 Answer

Recently purchased a Goodman gas furnace model GMVC950704CX. Continuous fan speed is preset to 30% of furnace maximum airflow which is 1500 CFM's. The furnace main board indicates that approx 500 CFM is being output by the furnace. The fan is on but running at a much slower speed approx 200 CFM's as measured by the installation contractor. A firmware update to the main board as well as trying different speed settings on the furnace has not resolved the problem. Last suggestion was to install a communicating thermostat that would override the main board control of the fan at a cost of $400. Not sure if this would even work. Any assistance would be greatly appreciated. Thanks

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Heating & Co... Master
  • 2,463 Answers

I would contact goodmans tech guys for this they are on line or e-mail don't think a $ 400 Thermostat is the answer here

Posted on Mar 27, 2011

1 Suggested Answer

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,
a 6ya expert 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 repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

After one heat cycle, the blower motor keeps running, even after cool down is complete. The furnace will not refire until i turn off the power and wait about 20 minutes for a reset.


your limit switch is opening up, that causes constant fan. Check for flashing codes after flame shuts off and fan continues. Check airflow, filters, lack on return air for possible hi temp limit problems.

Nov 17, 2011 | Goodman Heating & Cooling

1 Answer

I have a goodman furnace GMVC950704CX and GSC130301DA condensor, my problem is the coil is freezing up and I know the freon level is ok


Hello, if the freon level is ok then there is a airflow problem, such as dirty air filter, dirty evaporator coil, or the blower motor is not pushing enough air across the evap coil.

May 31, 2011 | Heating & Cooling

1 Answer

Goodman model PGB036075-1B will start the gas and the burner but will shut down before blowing heat. Is it a bad switch?


Hello, sounds like either a dirty flame sensor or open limit switch. First try cleaning the flame sensor by turning power off to the furnace and using some steel wool. If the flame sensor checks out good then you limit switch is opening becuase of lack of airflow. check air filter, clean blower wheel, and check to make sure the blower wheel is running at proper speed and not dragging sometimes cause by a weak capacitor.

Mar 06, 2011 | Goodman Heating & Cooling

1 Answer

Can I change airflow direction with Goodman GMS8?


I would probably use a furnace for the correct application. However some motors do have a reverse speed connection. Besides the blower speed taps,
capacitor wires and the nuetral wire. There are two wire sets that you can switch that can do this if your blower motor is equipped.

You might experience some airflow problems, probably a lack of airflow, if the furnace was installed
as an upflow model instead of a counterflow.

Feb 17, 2010 | Goodman GMS90703BXA Heater

1 Answer

Model #GMPN100-4 Goodman furnace. Vent fan


The sequence of events for furnace operation is -

Fan purge for 30-45 seconds. During this time, a pressure switch is actuated by the running of the purge fan, proving the control board the purge fan is running.

After purge and purge prove, the hot surface ignition and or spark begins. After a few second delay, the gas valve will open. The control board then monitors for flame prove through another sensor located near the burners. If there is no flame within 3-5 seconds, the gas valve closes. It will repeat this process, usually 3 times, before it shuts the system down, which requires a power down of the system to reset.

I have seen trash get into the hose between the purge blower and the purge switch. But you could be having other problems.

Dec 17, 2009 | Goodman Heating & Cooling

1 Answer

How to manually relight a Goodman® GMS9/GCS9 Single-Stage, Multi-Speed Gas Furnaces


You should NEVER attempt to relight manually this furnace. Serious burns could be the result. This furnace has an electronic ignition and should light by itself. If it does not light you may have a bad ignitor. These are usually around 30-50 US dollars.

Jan 28, 2009 | Goodman GMS90703BXA Heater

1 Answer

Furnace starts properly, then shuts down, led flashes 8 times


The first thing to look at is the flame sense rod.
Shut off power to the furnace, remove, clean sensor with steel wool or sandpaper then reinstall the sensor. Reapply power and it should run properly.

Jan 10, 2009 | Goodman GMS90703BXA Heater

1 Answer

I have a gmpn-80 janitrol 90% eff gas furnace,it is only 15 months old,my condisation tray is melting and cracked do to heat in which case leaks water all over....why would this be happening?


Most likely the cause is that the furnace is firing too hot. When a furnace is installed and set up, the manifold gas pressure and fan speed has to be set by the technician so that the temperature rise through the furnace is a maximum of 50 deg F (i.e. if air enters the furnace at 68 deg F it come out no hotter than 118). The target temperature rise on any gas furnace is anywhere between 30 and 50 deg F. If the furnace runs too hot, either the manifold gas pressure must be turned down or the fan speed must be turned up to keep in this range.

Jun 28, 2008 | Heating & Cooling

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

Related Topics:

144 people viewed this question

Ask a Question

Usually answered in minutes!

Top Heating & Cooling Experts

paulcarew

Level 3 Expert

2461 Answers

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

Donni Steen

Level 3 Expert

659 Answers

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

Answer questions

Manuals & User Guides

Loading...