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Holly LSI forced air heater burners will light, fan will not blow. Fan works with on switch on, everything normal except fan not working on auto.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 2039 Answers

SOURCE: Heater blows cold, and fan switch only works on 4 and 5

working on 4 and 5 speed that the resistor that broken cold air you got to move the selector to see the motor that move the trap hot and cold sometime when the motor was not move to the hot side for a long time its jam the motor on the passager side under dash put to hot and gently tap the motor tanks pierre

Posted on Nov 09, 2008

  • 85 Answers

SOURCE: Heater no longer works on auto fan, only manual fan

When you call for fan in auto ensure your getting 24 volts at pin on control board, if it is not energizing then there is a problem with the relay.. Before you change out the expensive control board, try the therm..

Posted on Dec 09, 2008

carldc3
  • 82 Answers

SOURCE: question on a day and night gas forced air heater

it very well sounds like your fan switch , does your fan work at all, like in ac mode on by turning the fan on/auto switch on the thermostat to ON. If the fan does come on its the more and likely the limit switch. if it doesnt come on it could be the motor or the run capacitor. the limit switch has a dial on it that as it heats up it spins clicking on at a desired set temp ussually about 120 to 150 degrees F. turning on the fan if the fan doen't come in the the next setting clicks off the gas valve turning off the burners ussually set at about 220 degrees F. now if the fan is working when the heater is satisfied there is a setting at about 90 deegrees F. that shuts the fan off hope this helps

Posted on Jan 05, 2009

jamaicanmech
  • 17 Answers

SOURCE: My 1999 Ford F150 Heater only blows out cold air

guys have you checked for a vaccum leak????? there is a little plastic ball with a vaccum line going to it that controls the outside air coming in. check for a leak in this line

Posted on Jan 08, 2009

  • 1 Answer

SOURCE: remington 60 portable forced air heater 60,000 btu

I had the same problem. I took the nozzle head off and blew through it with air. I also blew through the air line, this is the one that goes to motor. It has worked fine ever since.

Posted on Jan 16, 2009

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Question on a day and night gas forced air heater


it very well sounds like your fan switch , does your fan work at all, like in ac mode on by turning the fan on/auto switch on the thermostat to ON. If the fan does come on its the more and likely the limit switch. if it doesnt come on it could be the motor or the run capacitor. the limit switch has a dial on it that as it heats up it spins clicking on at a desired set temp ussually about 120 to 150 degrees F. turning on the fan if the fan doen't come in the the next setting clicks off the gas valve turning off the burners ussually set at about 220 degrees F. now if the fan is working when the heater is satisfied there is a setting at about 90 deegrees F. that shuts the fan off hope this helps

Jan 05, 2009 | Honeywell L4064B2236 Fan/Limit Control...

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Blower fan will not come on when set on Auto in heat mode.


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Oct 24, 2008 | Ruud UBHC Air Conditioner

1 Answer

Heater work when switch to fan on but doesnt work when swithed to auto but the ac works on auto or on, conufused please help


When switched to on does it make heat or is ir just the fan blowing? Take the first cover off the thermostat and see if there is a jumper wire from RC to RH. If not you need to add one. Also, the heat doesn't come on instantly like the A/C, it takes a couple of minutes for the pilot to lite, the burners to come on and then the time/temp delay relay will click on the fan motor, this may take a few minutes.

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