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ernesto1959  
#11 Posted : Friday, January 9, 2009 12:52:48 AM(UTC)
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ernesto1959

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Joined: 1/6/2009(UTC)
Posts: 18

Turn off the power at the furnace, jump w -r ( white wire to red ) that comes from t/stat, (24 volts) , colors may not match but terminals in unit , yes so jump w-r...... T/stat must be in off position and fan in off . turn on the power and just heating mode need to come on; fan must be off. take the time , must be on really quick just when powered. ..must hold unit burning for a couple of minutes and then the fan must turn on.
icehouse  
#12 Posted : Friday, January 9, 2009 5:43:36 AM(UTC)
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icehouse

Rank: Advanced Member

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Joined: 9/1/2008(UTC)
Posts: 440

Amazing that OP asked about "fan control' and gets a thermostat procedure. :rolleyes::rolleyes:
Anyhow :
Combination Fan & Limit Control: This control turns the furnace blower on and off at the proper times. The FAN ON setting on this control makes sure that the blower fan does not turn on (even though the building thermostat has asked for heat) so that the furnace wont' blow cool air into the occupied space.
Furnace FAN ON: When an adequate warm temperature has been reached inside of the furnace warm air plenum chamber the FAN ON switch turns on the furnace blower to deliver warm air to the occupied space.
Furnace FAN OFF: The furnace combination fan and limit control FAN OFF setting lets the furnace blower continue to run for an interval after the furnace burner has turned off, but will shut the blower off after the heat exchanger has been cooled down and the heat it contained has been sent to the occupied space.
Furnace LIMIT: The LIMIT indicator setting is a safety control that will turn off the oil or gas burner if temperatures inside the warm air plenum exceed a safe level.
When does the furnace blower turn OFF in normal operation?

When the thermostat has been satisfied and turns off the oil or gas burner at the furnace, the fan limit switch will cause the blower or fan unit to continue to operate until the temperature at the supply plenum has reached or dropped below the "cut-in" or "fan-on" lower limit on the switch.
When does the furnace oil burner, gas burner, or other heat source turn OFF in normal operation:

On most heating systems the burner or heat source will continue to run all of the time that the building thermostat is asking for heat, and will stop running as soon as the thermostat is satisfied. If the furnace oil or gas burner is very high capacity, or if the furnace fan/limit controls have been set to cause this effect, the burner may on some systems cycle on and off periodically while the warm air blower continues to run.
ernesto1959  
#13 Posted : Friday, January 9, 2009 1:09:52 PM(UTC)
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ernesto1959

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Posts: 18

Originally Posted by: IdahoBiker Go to Quoted Post
Well at this Point the Blower is Coming on 1st (Hi-Speed // 2-speed Motor)
then after 10-12 minutes the furnace starts the ignition process...so HOW do I correct this Problem? When the Blower Motor was Changed out, the Serviceman swapped out the Old Motor with the New, and informed me that The wiring was different, but that He knew How to correct that, as he had done that many times, I'm wondering If he got his Wires Crossed:rolleyes:, pardon the Pun. the Bottom Line is I have a Lot of $$$ tied up in New Parts, and just want it to work right.In response to the "Set-Delay", it's NOT doing that: It comes On, and goes Out (repeats this Process 6-9 times, before It Ignites Constant) So what do I need to do to Troubleshoot & Repair?

Any ideas on WHERE? I can attain a Parts Schematic for this Furnace? It's a Model 397HAW036060 Day & Night (Mfg. by Carrier) in 1982
"day and night comfort.com " is the web site or call carrier (totaline stores) they have a website.
fatima mehru  
#14 Posted : Friday, November 10, 2023 1:52:00 AM(UTC)
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fatima mehru

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Joined: 11/10/2023(UTC)
Posts: 0

It seems like your Carrier Day & Night Furnace is experiencing ignition issues, leading to prolonged heating cycles and cold air blowing into the house. To address this, you may want to check the flame sensor for dirt or corrosion, as a clean sensor ensures proper ignition.

Additionally, inspect the gas supply and pressure, ensuring it meets the furnace requirements. Check the air filter for blockages, as a dirty filter can affect airflow and heat distribution. If these steps don't resolve the issue, it's advisable to consult a professional technician to thoroughly assess and troubleshoot the furnace for more complex problems that may require adjustment or replacement of components.
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