Ask Experts Questions for FREE Help !
Ask
    mehtaajay's Avatar
    mehtaajay Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Jan 27, 2012, 12:37 AM
    Day n Night Gas Furnace - Blower works but no heat
    I have a Day n Night gas furnace. The blower seems to be working as expected but the gas does not light up. I cleaned the filter which was extremely dirty. Any thoughts? Thanks.
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
    		  
    #2

    Jan 27, 2012, 08:51 AM
    Does it have a pilot lite? Or a electronic igniter?
    Is the pilot lite/igniter working ?
    ,

    More info is needed ,tell us all you can about your furnace, along with the model number could help
    mehtaajay's Avatar
    mehtaajay Posts: 3, Reputation: 1
    New Member
    		  
    #3

    Jan 27, 2012, 10:17 AM
    It is Day n Night Model 383KAV048075 Series B made in 1993.

    I ran a self check and it only went through step A (Inducer Relay) then skipped steps B and C (Igniter Relay and Humidifier Relay) and then did Step D (Blower on).

    I checked the blade fuse and it is fine. There is 24+V on the secondary side.

    I do not smell any gas and the heat does not come on. The blower seems to work.

    Any help will be appreciated. I am pretty mechanical but have not worked on this problem before.
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
    		  
    #4

    Jan 27, 2012, 11:57 AM
    On start up
    1st inducer starts and runs
    2nd igniter comes on (should see it glowing)
    3rd gas valve opens and burners fire up
    4th after about 90 seconds blower comes on

    Very carefully (they are fragile) check igniter ,if it plugs up you can check continuity of igniter,or sometimes just look for any breaks or lighter grey area that shouldn`t be there tells you its in need of replacement
    mehtaajay's Avatar
    mehtaajay Posts: 3, Reputation: 1
    New Member
    		  
    #5

    Jan 27, 2012, 12:57 PM
    Igniter does not come on. It stays cold. I will try to check voltage across it. Should it be 24V?
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #6

    Jan 27, 2012, 03:57 PM
    Unplug the igniter and check for 120v across the supply wires. If you are getting that voltage, it means your igniter is bad. You can also unplug the igniter and test for continuity across the actuall igniter wires, if no cont, its bad. Let us know what you find.
    T-Top's Avatar
    T-Top Posts: 1,871, Reputation: 100
    Ultra Member
    		  
    #7

    Jan 27, 2012, 07:26 PM
    With the furnace door switch taped closed use a jumper wire and jump from R to W on the furnace control board. What works? If you have a noticeable white spot or crack on the black part of the igniter(element). Its bad. You can get one at any local hvac company.
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Day and Night Furnace Blower Won't Stop Running [ 8 Answers ]

I have a Day and Night Furnace that is about 15 years old. It works fine and is producing heat but the BLOWER seems to be stuck and runs constantly. Friends tell me that it could be the Blower Relay or a bad thermostat. Is the blower relay something I can change myself? There is a schematic on...

Day + Night furnace blower only comes on with no heat [ 18 Answers ]

Hello and Happy New Year... We have about a 15 year old Day + Night furnace that only the blower comes on with no heat... Is there a way to test the limit switches? There is 4 of them in the furnace.. There is a small square button in the center of all of these switches.. I wanted to test these...

Day & Night furnace blower runs every minute [ 11 Answers ]

The Day and Night furnace air blower runs for 20 seconds every minute. This happens even when the thermostat is completely disconnected. The only way to stop this is to unplug unit for several hours( 3-6 ) then it will operate normally for 6-8 hours before starting the blower every minute. Any...

Can blower motor speed be adjusted on a Day and Night furnace ? [ 1 Answers ]

I have a Day and Night up flow furnace, about 13 years old. Can the blower motor speed be adjusted to a slower speed ? There is only 8 feet of duct and the noise coming out of the registers is very loud. Model # 395CAV036055 66,000 BTU Blower # 511, 1/3 hp If no one has any info, does...

Day & Night gas heat will no come on [ 1 Answers ]

I have a 1993 Day & Night air and heating combo, when in the heating position the gas burners will not come on. When I disconnect the power disconnect on the side of the unit and plug it back in the heat will start. It will function properly for about two to three weeks without any problems. The...

View more questions Search