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Armstrong 4PHP13E36P runs after heating element cools

I need to know where to adjust the length of time that an Armstrong 4PHP13E36P-1A blower runs after the heating element shuts off. The unit blows cold air into the house after the heat stops, which cools the house, causing the thermostat to start the whole cycle again. This is clearly wasting energy and wearing out our unit prematurely.

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  • peyton thompson
    peyton thompson May 11, 2010

    the time is preset on the fan relay if the fan is not shutting off after 1-2 minutes then the fan relay is bad and needs to be replaced.

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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.

Posted on Mar 10, 2009

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When thermostat turned up furnace ignites, heats and fan starts when plenum is up to temp. When thermostat is turned down flame goes off but fan continues to run.


If your furnace is relatively new, as in 10 years old or less, there should be a field adjustable 'cool down' cycle. On the circuit board there should be a dip switch or series of dip switches with 30, 60,90,120 indications. These numbers represent the length of time the relay on the circuit board allows the fan to run AFTER the thermostat satisfies. You may be able to adjust the time frame down one position from where its positioned now.


The second possibility, if the blower never shuts off at all is that the relay itself could be stuck in the closed position and keeping the fan on.

Sep 30, 2015 | Heating & Cooling

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Why won't it start?


It should automatically restart.....BUT what happened is that when you unplugged it, you cut off the blower at the same time you cut off the heat element(s). The way it is supposed to work, is the thermostat cuts power off to the elements and the fan continus to run for a per-determined amount of time to remove al the heat from the elements. Then another 'fan control switch' shuts off the fan once the 'residual' heat is removed from the heater. Without that 'cool down' cycle, the hot element had enough 'residual' heat in it to trip off the 'thermal overload' in the circuit. The 'thermal overload'... or...'hi limit'...or...'hi temperature control' is resposible for shutting power off to the element(s) in the event that the blower fails.

Sep 24, 2015 | Heating & Cooling

1 Answer

Why won't it start?


I copied and pasted this answer from your other question as I thought it was the same one Sherry.... Hope it helps you.

It should automatically restart.....BUT what happened is that when you unplugged it, you cut off the blower at the same time you cut off the heat element(s). The way it is supposed to work, is the thermostat cuts power off to the elements and the fan continus to run for a per-determined amount of time to remove al the heat from the elements. Then another 'fan control switch' shuts off the fan once the 'residual' heat is removed from the heater. Without that 'cool down' cycle, the hot element had enough 'residual' heat in it to trip off the 'thermal overload' in the circuit. The 'thermal overload'... or...'hi limit'...or...'hi temperature control' is resposible for shutting power off to the element(s) in the event that the blower fails.

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1 Answer

Our dryer shuts off completely when we dry several loads in a row. It restarts when we allow it to cool down. What is the problem?


Dryer runs then shuts down wont start up for an hour:
Bad motor windings OR DRYER OVERHEATING:

Heating Element
A defective heating element can make a dryer too hot. If the element partially shorts out, it can produce heat all the time, regardless of whether the dryer is calling for heat. Remove the heating element to inspect it. The coils should not be touching each other or anything else.

Other Causes and Conditions
Air Flow Problem
Dryers need good ventilation to work properly. If the vent is clogged it can make the dryer too hot. Clean all of the vent tubing thoroughly.

Cycling Thermostat
Although not common, a defective cycling thermostat can make the dryer too hot. The cycling thermostat is supposed to turn on and off the heat to maintain the proper temperature. If the thermostat is defective it may keep the heat on too long. The thermostat is not adjustable or repairable, it must be replaced.

Felt Seal
Most dryers have a felt seal at the front and rear of the drum to keep the heat inside the drum. If the felt seal is worn away or missing, the dryer may keep heating and make the dryer too hot. This is not common.

Blower Wheel
A defective blower wheel will not spin properly and will not vent the hot air, making the dryer too hot. Check to see if there is adequate airflow out of the dryer.


https://www.youtube.com/watch?v=3m5NZvY9V5Q

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1 Answer

I have a charmglo electric fireplace blower works but there is no heat is it the thermal cutoff and if it is what do I replace it with and also can it be put in backwards


More than likely it's the Thermal overload circuit or the heating element has given up the ghost.

As I just told one other questioner. These types of electric fireplace heaters were not designed to run for long periods of time. Their heat output is not much more than a blow drier. However, this is not just a problem with CharmGlo, it's with all the manufacturers.

Here's the problem ... The heaters work by taking in cool air, heating it and sending it back out via the blower. Over time, the heating element and/or blower become clogged with dust, lint and/or pet hair. This makes the heating element work harder and it over heats. Either burning out the heating element or the thermal overload switch or both.

You can try cleaning the heating element with a vacuum that has a hose and a brush attachment. While you're at it clean the blower fins and motor. Consult your Owners Manual to see how to access these parts, as they are under firebox, behind the metal grill on the bottom of the firebox, so to speak.

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My Dimplex DFB 4047 won't get very hot


This is an on going problem with electric fireplace/stove type heaters of all types. Not just Dimplex.
They are not designed to run for long periods of time and the heat output is not much more than a blower dryer. In any event, they take in cool air, heat it and send it back out. Over time, the heating element becomes clogged with dust, lint and/or pet air. So, they have to work harder to produce a sufficient amount of heat. Cleaning the heating element with a vacuum that has a hose and brush attachment may help. The heating element and blower are under the stove. See your Owners Manual on how to access it. Be sure to unplug the stove before trying to service/clean it.

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My Armstrong model # GUJ100D12-3A just stopped working. The blower seems to work, but cold air just comes out. The Temperature in the house was 41 degrees, but I had the thermostat on 60 degrees. What...


Toget proper heat, keep your temp setting at 30+ degree and also mode in "heat"position. If still no heat, check your heating sensor for closed circuit by anOHMs metre.It it's with RV, check power to RV.If it's with heatingelement check power to element. If power is there but still no heat meanselement defective. Replace new heating element. Thanks.

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1 Answer

CYCLING TO OFTEN


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High limit switch open on armstrong furnace


If you know where the high limit switch is you can always cut the two wires and wire them together causing the limit to close. But what you have to watch out for is why the high limit is not closing. That means in your return air either you have a dirty return air duct, dirty filter, or you don't have all your registors open to allow the heat to escape the heat exchanger. Just watch over riding the system. The high limit switch should either be on or behind the blower, in the middle of the system right under the heat exchanger. any other questions about hvac just ask.

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