Question about Goodman GMS90703BXA Heater

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Seems that furnace runs every 5-10 minutes

Thermostat anticipator is set correctly. Just seems the unit runs more than it should.

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  • Goodman Master
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Check air filter is clean also automatic fan control settings try that first

Posted on Jan 08, 2009

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Posted on Jan 02, 2017

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WHAT SHOULD THE heat anticipator BE SET AT ON A MODEL COAT066BDA COLEMAN EVCON FURNACE


The typical starting point for heat anticipation is .4 amp. If you do not have a clamp-on ammeter, adjust it to .45 and observe operation for a few days. If not quite right and still short cycling slip it to .5. Then keep doing this until you are satisfied cycle time is correct.

If you have an amprobe or can borrow one, remove the stat and take a single loooooong thermostat wire. Attach it to the R or Rh and wrap it around the clamp on ammeter ten times then attach the other end to the W terminal. The furnace will initiate the heat cycle at that point. Observe the amp reading on the amprobe when full heat is on, DIVIDE that reading by ten (for the wraps of wire) and adjust the heat anticipator to THAT setting.

Feb 05, 2015 | Coleman Heating & Cooling

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How do I Set the Thermostat Anticipator


If you have an older thermostat that has a heat anticipator in it then there are some things that you need to know about setting it and what it actually does.

First the function of the heat anticipator is to fake the thermostat into feeling the room temperature as hotter than it really is. The heat anticipator is actually a variable output heater inside your thermostat. The amount of heat that it actually produces is very, very small. This heat does, however, make a difference in how the room temperature feels to your thermostat.

If no extra heat is made inside the thermostat it will not react quickly enough to shut off the heating source. This will make the room “overshoot” the set point of the thermostat.
By heating the thermostat up very slightly it then shuts down the furnace or heat source before it actually reaches the temperature set point. This will allow the left over heat to go into the room and raise the temperature to the set point by the time it is all used up.

If you are experiencing wild temperature swings or the room temperatures are either not getting to the set point or going over the set point then the heat anticipator either is not adjusted right or it is burnt out and not working at all.

There are a couple of different types of heat anticipators. They will usually look like one of these.

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If your heating is running too long then you will need to adjust the setting to a lower number. If you are not getting enough heat then go to a higher number. All you are changing when you do this is the amount of the heat coil you are using. Make small adjustments to the anticipator and then give it at least a half day before making more adjustments. Small changes can have a big effect if the heat anticipator is working correctly.

You also can set the anticipator by checking the current draw of the system. To do this you need to use an amp meter and measure the current draw of the heating unit when it is running. Then set the heat anticipator to the corresponding number of the current draw. This will at least get you a good starting point and some fine small adjustment can be made from there.

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For more advanced digital thermostats there are cycle change features that do what this heat anticipator does in older thermostats. These often incorporate many things in determining the cycle length of the heating. These thermostats will not have a heat anticipator setting.

Like many things when it comes to your comfort, all people feel things a bit differently. You need to make the changes to the thermostat so that YOU feel comfortable. There is no right way it has to be done. Make it work for you and adjust the thermostat so that you are the most comfortable!

http://www.fixya.com/support/r3892721-programmable_honeywell

http://www.fixya.com/support/r3623083-thermostat_wiring_terminal_designations

http://www.fixya.com/support/r3584298-air_conditioning_programmable_thermostat

http://www.fixya.com/support/r3898732-lux_thermostat_500

on Jan 30, 2010 | Heating & Cooling

1 Answer

Furnace start stop cycle


On properly sized furnaces there are a few controls to look at. Check the settings of the fan switch. If these are unchanged then there may be a reason the furnace is shutting off due to poor air flow and resulting high temperature. Check filter and verify air flow is good. It may be possible that a safety switch is failing and intermittently on and off. Are all the covers securely in place and hitting any safety switches? If not seated properly the cover may loosen when the fan runs and the switch shut off the unit. There is often a flame roll out switch that could have been strained. Lastly, has the thermostat been working long? Thermostats have internal heaters to stop the furnace which is called a heating anticipator. If the thermostat is near a heat source (heat duct, refrigerator, oven, person, hot water pipe), worn out, anticipator is set wrong (older electric thermostats have adjustable settings) or covered (yes, I have seen some covered) then the free room air cannot measure correctly and the thermostat cannot control what it cannot accurately measure. Of all these possibilities I would start with the thermostat and proper furnace air flow, second check the fan/high limit switch and third go component by component through the wiring diagram looking for defects in each component. If available follow the manufacturer's troubleshooting guide.

Jan 11, 2014 | Rheem Heating & Cooling

2 Answers

How do I adjust the heat anticipatory to its proper settings


Look on the gas valve. Or post the make and model

Mar 21, 2013 | Heating & Cooling

1 Answer

My themorsat stop working,and I replaced the batteries.


see this causes and fix it. God bless you

Furnace Produces No Heat Possible Causes


Possible Repairs
  • Remove cover of thermostat and loosen screws holding unit to wall. Level the thermostat. Re-tighten screws and replace cover.
  • To adjust the heat anticipator, please see Heat Anticipator Adjustment.

  • Furnace Turns On and Off Frequently ("short cycling")Possible Causes
  • Dirty thermostat components
  • Heat anticipator not set correctly.


Possible Repairs

Sep 30, 2012 | Honeywell Programmable Thermostat Heater

1 Answer

I have to play with thermostat to get my heating system on


You did not make it clear if the thermostat is a programmable unit or not. I am wondering if the thermostat is not set on the correct heat anticipation setting. A heat anticipater is a small heater that helps the thermostat turn off before it over shoots the desired temperature setting. If the thermostat is set for a 5 degree setting, it will turn off at 63 degrees if set at 68. If the anticipater was set at 1 or 2 degrees, it will shut off the heater at 66 or 67. Newer thermostats will only allow the thermostat to cycle 6 times per hour so if you never reach the desired temp, you have to wait 10 minutes before it will allow a call for heat. Check the installation instructions to see if there is a setting where you can get the anticipator temperature closer to your set temp. Good luck.

Dec 11, 2009 | Goodman Heating & Cooling

1 Answer

Installing 1 1/2 ton Weatherking Heatpump and ADP WAK351807P2 air handler 1 /1/2 with 7.5KW back up heat kit. Can't seem to get the thermostat hooked correctly. I understand the Weather King product...


O energizes the reversing valve when the thermostat is set for COOL. B energizes the reversing valve when the thermostat is set for HEAT.
The O/B is usually a orange or black wire.
You can't hurt anything if you choose O or B incorrectly. Hook one of them up and run the unit. If set for COOL and the unit runs cool inside it is correct. If set for COOL and the unit runs warm inside it is not correct.
If the inside temp is opposite from your setting change the wire to the other terminal.
Remember to disconnect power from the air handler when changing thermostat wires.
The defrost control board on the outside unit should be marked correctly for O or B.
Your thermostat may have a slide switch rather than a separate terminal.

Oct 30, 2009 | Weather King 10AJA6001AH Air Conditioner

1 Answer

Have a Coleman Evon Furnace, manufactured for Zone 1, in my 1998 Module Home. Have had 4 thermostats put on . Everyone has the same problem. Works fine for first week and then will not read correct temp....


Hang a small thermometer next to the thermostat to see how much it is off by. You did not mention what kind of thermostat you have been installing. Check in the instruction manual to see if it has a heat anticipator. Some thermostats have a small winding (heater) inside it that will anticipate the temperature raise and turn off the heater a few degrees before set poit. If this was not set, this would be your problem. If it is factory set, sometimes they come with a small resistor that must be installed in the wiring to help with the anticipator. If you find that the thermostat is still way off, yes you may need to relocate it. Kitchens can fool thermostats by the heat from the stove and refrigerator. You can either relocate the thermostat by changing the location of the wires and base or install a wireless unit that is easily mounted where you want without running wires.

Aug 18, 2008 | Heating & Cooling

1 Answer

Honeywell thermostat adjustment


The little pointer is called an anticipator, and it is just that. It anticipates how long to wait before coming back on. It has little numbers on it, hopefully you can read them. like .5 will wait 1/2 minute at that temp. before coming back on. It sounds like a high setting is what you are looking for, so a long time setting will be what you want, and if you haven't already figures it out, sliding the pointer is how to change the setting.

Feb 16, 2008 | Kitchen Ranges

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