Question about Goodman Heating & Cooling

Open Question

Robertshaw 8400 thermostat not working in auto

I have a robertshaw 8400 thermostat. If you switch it to a/c and turn the fan to ''on'', the a/c will properly turn on start cooling the house and the fan and cooling indicators on the display also turn on.

However if you set the fan to auto and then set the temp below the current room temp, the display indicators will turn on saying that the fan and cooling are on, but the fan doesn't actually turn on at all. This is a problem that recently started happening, it used to work fine. anyone know why this would happen?

Posted by on

  • gumud Jul 28, 2009

    edit - nevermind, i just realized what was happening. After i turned the a/c on manually and then turned it off, it wouldn't turn back on right away cuz of a safety feature. if i wait 3 minutes, it comes on fine. so this one is solved already sorry bout that

×

6 Suggested Answers

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

The HVAC Guy
  • 30 Answers

SOURCE: Goodman GSH130301AB heat pump with

the reversing valve wire needs to be on the o terminal.nothing will be on the b terminal on the thermostat

Posted on Oct 30, 2008

  • 56 Answers

SOURCE: ruud achiever 90 plus won`t start

Check the data information on the unit there should be a troubleshooting guide that tells you what the two lights blinking once means. hope this helps.good luck. normally found with schematic

Posted on Feb 12, 2009

farfield
  • 462 Answers

SOURCE: thermostat location on York Diamond 90 gas furnace

Augold, sometimes its best to set the thermostat where you "feel comfortable" . I.E. set it and leave it til you feel the need to be cooler or warmer.

A thermometer on a thermostat will not always be accurate and setting it will only get it within 2 to 5 degrees which is enough to "feel".

Now from the stand point of is it working properly????

Assume you feel comfortable and the heat stays on to keep you comfortable is their anything wrong with this? I assume this is the goal. Even if it says 90 (and you know its not 90) and your comfortable you could leave it alone and be OK. If this kind of thing is whats bothering you a new thermostat may not be much better, unless your ready to invest in one and accept it however it should be closer to the place youd set it. Id recommend an electronic type they are more accurate and level doesn't matter so much to these types.

If you want to set the temperature and are determined to go by a thermometer to "feel Comfortable" I recommend you buy an electronic thermometer and set it close by the thermostat. Make sure you have no lamps or other heat sources close to the thermostat area.
Remember the far end of a room or a chair by a window Especially with little or no curtains and on the prevailing out door wind will always feel colder and be colder than the area by the thermostat even if both are in the same room. If your too cold try running the thermostat up a few degrees. If too warm set it lower. The equipment doesn't care how cold or warm it is.You will not increase your utility bills to the national debt by being comfortable

If this helps please grade me accordingly and Good Luck.

Posted on Mar 03, 2009

SOURCE: Thermostat unit not cooling house.

Okay. Here's what I suspect in order of probability:

- low refrigerant charge
- contactor not getting 24 volts from controller (controller problem)
- bad contactor
- bad capcitor

I'd start with the charge, as suggested by mastatech. But if it is low, you'll need a service call, anyway, so pressing the needle valve may not be necessary.

I'm assuming you're not going to be taking the unit apart and testing stuff, so you'd need a service call for that as well.

I guess bottom line is, call for service. At least, I think we've ruled out simple stuff which will avoid paying for a service tech to come out and flip a switch.

Maybe mastatech has some other recommendations.

Posted on May 10, 2009

kingbrizzle
  • 407 Answers

SOURCE: problem with mitsubishi air roof units

The thermostat would need to be insulated better from the air that is surrounding it. Im assuming that the thermostat is located on the wall unit where it blows out the air. This could mean that it is actually reading more from the outside temp, than whats inside the house. Another thing to consider is the location of the thermostat, even it being close to anything in the house that produces some kind of heat will effect the condition of the air. If anything, its the manufacturers mistake if it was properly installed in the first place and if defective, they should replace it. hope this helps.

Posted on Dec 28, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

My robertshaw 9620 thermostat is stuck on 70 and i can not change setting frim temp or time.


Here's how I fixed my Robertshaw thermostat that was stuck at a 70 degree reading for almost 2 monthes. When I turned on the air conditioner or heater it wouldn't stay on. I removed the cover panel and dusted off the inside which the guy at local hardware store suggested. That didn't work. Then I noticed the words "reset" right on the green circuit board on the left side. There's a very small silver button. I pressed on it and everything reset. Less than a minute later the thermostat is reading the correct room temperature. Now my air conditioner and heater are working properly.

Mar 16, 2014 | Robertshaw 9620 digital...

1 Answer

Robertshaw 8400 thermostat e message


This happens because of the heat-up. You need to use it in proper switch. There may be a problem of voltage that it requires certain amount of voltage and it has not given to it.

Jun 16, 2013 | Electrical Supplies

1 Answer

Robertshaw 9420 thermostat engages inside fan in OFF position


check with the company u brought it from and check if you have not put the correct conector to the right temals on the back of the switch.

Jun 09, 2009 | Heating & Cooling

2 Answers

Robertshaw 9600: Temperature rises too high, fan doesn't stop.


It sounds like the thermostat is wired improperly. One quick was to check is by finding breaker to unit and shutting off power. Go to thermostat and remove from wall take all wires off thermostat besides wire going to R(might be RcandRh) and C(which is common) Tape all bare wires removed with electrical tape. Now go back to the breaker and turn power back on. Nothing should be running at all. Take a voltage meter and measure the voltage from R to W(which is heating). If you read 24V then the thermostat is open and not calling for heat. Now turn the thermostat up so it is calling for heat. You should read 0V from R to W. If this checks out your thermostat is probally fine. You can check the fan the same way by going from R to G. In auto you shoul read 24V from R to G and in th on postion you will read 0V from R to G. If the thermostat checks out then the problem is probably at the furnace or rooftop. Either with the thermostat wiring or the main board acting up

Jan 19, 2009 | Heating & Cooling

1 Answer

Thermostat problems


Have you confirmed that the thermostat is programmed correctly?

Did the thermostat ever control the temperature of the house properly?

When you indicate "kick", are you talking about flipping the Auto-On switch back and forth? The Auto-On switch only controls the fan, and no heating or cooling (Auto - fan runs on call for heat or cool, On- fan runs all the time.).

If "kick" means making the heating work, and if you have the same problem for making the cooling work, chances are good you have bad thermostat.

If the problem only occurs with the heating, and cooling works fine, then the problem could be in the controller board of the furnace, assuming you have a more recent (1990's or newer) furnace.

Jan 16, 2009 | Heating & Cooling

1 Answer

My hunter thermostate keeps flashing a 4 and wont turn on !


hunter thermostats are not the highest quality. on the back of the thermostat there should be a not well identified reset button. You can locate and push this to attempt to fix the problem. Or purchase a new (i would suggest Robertshaw or braeburn) thermostat and install.

Dec 14, 2008 | Hunter Fan Company 5/1/1 Programmable...

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

Related Topics:

858 people viewed this question

Ask a Question

Usually answered in minutes!

Top Goodman Heating & Cooling Experts

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

paulcarew

Level 3 Expert

2458 Answers

Brandon Berry
Brandon Berry

Level 2 Expert

407 Answers

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

Answer questions

Manuals & User Guides

Loading...