Question about Honeywell Power Humidifier: Furnace Humidifier/ Humidifier

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Furnace keeps running, no heat

The furnace doesn't even try to ignite, just keeps blowing plain air

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  • 306 Answers

The pressure switch is not allowing the igniter to heat up. Pressure switch is blocked or the flue is blocked. Take the draft fan off and inspect the flue. Also inspect the rubber hose connecting the fan and pressure switch make sure the ends are tight. Make sure the hose is clear and not restricted. And the pressure switch sometimes is position sensitive. I don't think it has been moved or anything. And very rarely do they go bad.

Posted on Dec 02, 2008

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Posted on Jan 02, 2017

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My lennox furnace works just fine except that 25% of the time the fan keeps running when it shouldn't and blows cold air


You are using too restrictive of an air filter. If the codes you are getting off the lights says anything about a high limit this is the cause of your blower running all the time. Use a less restrictive filter or have your contractor install a media filter in the system. if you reset the furnace and it does not stop running the blower you have a stuck limit switch and may have to get another or call a service tech to reset it or replace.

Oct 27, 2013 | Honeywell Power Humidifier: Furnace...

1 Answer

If i hook my Aprilaire 400 Manual (not auto/digital) humidifier up straight to a 24v wall outlet instead of to the furnace, will it still work correctly? Or does it need to be powered by the furnace to...


Your humidifier is a bypass type. The only voltage needed is 24vac to open the water valve. Air only flows through the humidifier when the furnace blower is running, and the wet pad will add very little humidity if the furnace is not running and heating the air before flowing through the wet pad in the humidifier.
It is best the water valve is only energized when the furnace is running. Some furnaces have a connector on their control boards labeled HUM for this purpose. Test it's voltage when the furnace is running because some will output 110vac instead of 24vac you need.

Jan 31, 2013 | Aprilaire 400 Humidifier

1 Answer

Honeywell HE260 leaks somewhere


Neither, even if the solenoid or humidistat stick, it should always drain properly. Is the unit mounted on the cold air return duct or the supply plenum? If it's mounted on the supply plenum, the water panel might be getting blown forward and spilling the water. High efficient furnaces also can leak water on the floor if its drain is restricted. If hum. is mounted on return duct make sure drain is clear by blowing through it. On Honeywell hum's I've seen the rubber hose from the solenoid valve to the distributor tray leak too, check the rubber 1/4" hose.

Dec 28, 2009 | Honeywell HE260A1010 Whole House...

1 Answer

Mod#BLU100K948A The 2 selenoids on top of gas valve click when they open (normal). Sometimes they work fine, sometimes they have a rapid clicking noise and do not open the gas valves. Furnace just runs and...


The first thing to check would be the filters in the house to make sure they are clean, then check for any blockage. One easy way of seeing if the airflow is good, just put your hands in front of a vent and see how its blowing. Your furnace has what you would call sensors, and if they sense the air flow is inaccurate or to hot inside the unit, the unit will run, but not light. Also, if it tries to relight to many times, the furnace will go into lock out and you have to manually reset it by cutting the power to the furnace. Its kinda hard to diagnose these sometimes over the pc, but I hope it helps.

Nov 02, 2009 | Honeywell Power Humidifier: Furnace...

1 Answer

Amana furnace main burner intermitent


Sounds like dirty flame sensor. You can either clean it orreplace it.

Apr 21, 2009 | Honeywell Power Humidifier: Furnace...

1 Answer

Furnace blower blows cold air


It is possible that you did not set the new blower on the proper speed. Black wire is high. Blue is medium. Red is low. If the fan is operating to slow it can run to hot and trip the high limit control. Make sure the filters are clean. When the old motor went bad, the problem might not have been discovered rite away your high limit control might need to be changed.
Also anytime you work on a furnace you can kick up some dust. Always clean the flame sensor.
Good Luck
HVAC Teacher

Mar 08, 2009 | Honeywell Power Humidifier: Furnace...

1 Answer

Blower won't stay lit


If the fan motor is blowing out the burner then is there a hole in the heat exchanger

Jul 18, 2017 | Honeywell Power Humidifier: Furnace...

1 Answer

Install HE220 HoneyWell , humidity not increasing in the house.


You can try installing the water line to your hot water if it is installed on cold line for more humidification. You should make sure your humidistat is up line 6" @least from humidifier for proper humidification measurement.

Feb 26, 2008 | Honeywell HE220A1019 Whole House...

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