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.
An expert who has achieved level 2 by getting 100 points
An expert that got 5 achievements.
An expert whose answer got voted for 20 times.
An expert who has written 20 answers of more than 400 characters.
Re: Armstrong 4PHP13E36P runs after heating element cools
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.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
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.
The heat runs the blower until the heating elements cool to a specific level, to get all the heat out of them. The switch wears out and or sticks (called a Limit Switch). if you have a handyman he may be able to lube it w/electronic lube spray but it may beworn out. $30 part, plus service call.
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.
Sounds like control voltage problem. Tsat mat be bad. It is hard to say without looking. Next time this happens. Have someone stands out side by the unit to see if the contactor is pulling in. When you turn the Tstat off and wait and turn it on you may be manually make the contact in the Tstat. If the fan and compressor are not running when you call for cool, Most of the time it is the control voltage. Let me know if the outside fan runs and the compressor does not. Rusty
A blower relay usually has a set of closed contacts that go to the motor and when the 1st element comes on the power goes on through the sequencer and then these contacts and to the motor heating speed. If you have a blower in AC and with the fan sw to ON u can run the blower on manual 100% of the time until someone can come look at it and the heater coils will cycle on and off with the thermostat. Dont worry about the cost compaird to the elements the motor is nothing and the heat it generates is going into the heated home anyway.
My heating unit is blowing cool air. The thermostat will start the blower when the unit is turned on at the thermostat, but the air isn't hot. But,when I turn the unit on at the furnace/blower using the "Fan On" button, I can see the heating element heat up. After the blower starts the heating element does out. What could be the problem?
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.