Question about Montgomery Ward (223600UP) Heater

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I have a Mont Ward 500 gas heat system that the blower keeps running, Im thinking it's the thermostat. If that's it, which kind should I get?

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There is a pull switch on the Fan Limit Control. Check to see if it is pushed in. Pull it Out for normal operation.

Posted on Oct 27, 2013

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I have a coleman furnace model 4066A656


Make sure your air filter is clean. Is the thermostat satisfied? or is the room temp. still below the thermostat setting? When ever you have to turn the power off and then back on to a furnace that usually indicates that the furnaces ignition control locked out. The first thing that I would try is cleaning the flame rod.

Mar 02, 2017 | Coleman Heating & Cooling

3 Answers

1993 goodman status light 4 times blinking


Witch blower is running, the inducer or the systems blower?
System blower could mean the the high limit is opening and shutting down the systems gas train, I would check this out first.

The other problem could be with the pressure switch for the gas train, it is supplied from the inducer motor, check to see if it is operating fully.

HSI boards do go from time to time, this sounds more like a system control problem.

Jan 24, 2008 | Goodman GMS90703BXA Heater

1 Answer

My program is set for heat from 6:00am to 10 pm.. Furnace not running even tho set for 70, actual says 65. small message on screen next to temp "following schedule in recovery". How do I get heat?


You will need to do additional trouble-shooting. This could be a faulty thermostat, a broken wire at the thermostat or a problem with the furnace. At the thermostat, check that the wires are fully seated at the terminals. Make sure that the conductors haven't broken. (I've seen the wires break after they weakened.) You can try placing a jumper between the terminals for heat and ground. (For a single-phase forced air system, the Rh wire calls for heat.) If your system has a C (common) wire, make sure that the voltage is getting back to the furnace. You can try a different thermostat.

Also look at the furnace. Some systems will have an LED indicating a problem with the unit. Gas systems can have a problem with the flame. Gas or electric forced air systems could have an issue with a blower. Heat pumps can freeze up if the temperature is below their operating range.

I hope this helps. Please add a comment with the manufacturer and type of furnace (oil, gas, steam boiler) that you have if you need more ideas for trouble-shooting.

Cindy Wells
(my own gas furnace went out on Wednesday and was temporarily fixed by resetting the thermostat and using a jumper across the appropriate terminals. The flame didn't come on at 6 A.M. when the thermostat called for heat. Today, the blower completely failed and needs to be replaced. The earlier failure is likely to be related to this failing blower motor. When I followed the manual's instructions for testing the system, I got a "needs service" code. However, the unit didn't display a trouble-code before I did that test.)

Dec 16, 2016 | Heating & Cooling

1 Answer

Heat not blowing on heat cycle


Have to know what kind of heat it is, Gas, Electric or Electric Heat Pump.

Heat pumps, when air over air type, have an extra setting on the thermostat labeled Emergency Heat, Although these thermostats can work on the other types of heating as well.

Both modern Gas and electric furnaces have the blower controlled by a blower board. The flame and or heating elements can also be controlled by the same or a separate board. SO you could have a board problem, or a safety switch or other symptom causing a safety switch to trip off on you.

Consult with your diagram and find something you can recognize then trace the wires down and follow to where you get the power to turn on the heat (usually always R feeds thermostat and W feeds Heat). Colors of the attached wires means nothing at this point. Look for the terminal designations not colors.

Hope this helps you. Please grade me accordingly and GOOD LUCK. :)

Mar 03, 2009 | Ruud Central System Air Conditioner

1 Answer

I replaced my Janitrol 7 wire thermostat with an RTH7500 which now controls my heatpump system. The switches on the Janitrol were cool - off - heat - Em Heat. Does that mean I have auxiliary heat? There is...


There should be electric heat strips in the airhandler.

They automatically come on when the unit goes into defrost, the thermostat is turned up more than 7 degrees over the indoor temp or if the outdoor temp is just so cold the HP cannot keep up.

Tat is your auxillary or emergency heat.

What does the new t-stats installers booklet say that the 0170 function and #2 #7 options are for?

If it is for gas vs elec heat then set it on the elec option.

The difference is that in gas heat systems the blower comes on a few min AFTER the furnace fires up to allow the heat exchanger to get hot.
In an electric furnace the blower has to come on emediatly because the heat strips get hot emediatly and if the blower is delayed the system will shut of in high temp overload.

Dec 18, 2008 | Heating & Cooling

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Blower on colman gas furnace will not come on. (have no gas yet)


I'm not a furnace technician. But I have worked on several Coleman trailer furnaces. So keep in mind that my terminology might not be exactly correct. But I think I can help you.

I don't know what model you are running, but most of them run pretty much the same. You have a four basic components to check. Thermostat; Ignition Control Module; Pressure Switch; and which ever of the following that you have (Glow plug, Electronic ignition, Pilot Light).

I'm assuming that you are referring to the blower as the "Rat wheel blower" (round wheel looking thing with fins on it). If my assumption is correct and if the power from the breaker box to the furnace junction box (Probably with a on and off switch on top or side), than when you give it power (from breaker box and turn thermostat up) the fan (not blower) comes on. If it doesn't there is a probably a problem with your Thermostat or Ignition Module. If it does come on and your glow plug or you igniter tries to work. Than yes, you are correct, you have to have gas pressure to let the pressure switch know that there is adequate gas supply pressure (gas- 5 to 7 W.C, propane 11 to 13 W.C). The reason for this is if the Pressure Switch doesn't feel the correct pressure. It thinks you have a leak and won't release gas for ignition. After you turn the gas on. If the furnace doesn't ignite. Make sure the Thermostat is definitely wired properly. Now we are down to one of three problems. If the Glow Plug, Electronic Ignition, or pilot light are working properly. Than we are down one of two problems. The Ignition Module or Pressure Switch. Check pressure on the Pressure Switch. If yuou don't smell gas it is probably OK. But it is best if you use a manometer. I have rarely found Pressure Switches bad. Normally if I get to that step. It is the Ignition Module. The Ignition Module kind of like the brain of the furnace. It is located behind one of your front panels. It will have approximately 10 wires going to it. Some will be going to the Thermostat, some to the Glow plug (Igniter), some to the Pressure Switch, and some going to the blower.

I have probably said more than you need to know. If I did I apologize. But to wrap it up. You were probably correct. You definitely need gas for the blower to kick on. The furnace has to light and heat up before the blower will Start. Not to keep rattling, but to check to see if the blower motor will run. Is to switch the Thermostat from "auto" to "run".

Good Luck

Nov 17, 2008 | Coleman Propane Forced Air Heater...

1 Answer

DIPLOMAT FREEZER MODEL NUMBER APP6403 MOTOR RUNNING CONTINUOUSLY NEW THERMOSTAT FITTED STILL THE SAME MOTOR KEEPS RUNNING


This kind of a problem could be caused by;
The system has a leak and is not reaching the shut off temperature of the thermostat.
The compressor is worn out and not pumping gas fast enough to reach shut off temperature.
Dirty condenser not allowing the system to get rid of the heat.

Jul 31, 2008 | Refrigerators

2 Answers

Ward Heater Company M0021


These old units have a simple gas valve and a separate regulator. Your best bet may be to replace the gas valve to something more modern. Trouble shooting this most likely be a waste of time, as parts probably aren't available, other than the thermostat. by-pass it, (connect the 2 wires together) and see if it comes on. The blower shouldn't stop the burner to come on. Sounds like the gas company doesn't want to crawl under there to light it.

Dec 15, 2007 | Montgomery Ward (223600UP) Heater

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