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I have a Fedders electric furnace and a service technician connected a red wire "post purge fan relay". Now fan run all time in heat mode. What is this wire for?

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: Installing a Honeywell Programmable Thermostat with my Bryant Puron HVAC System

i hope this helps

Posted on Aug 18, 2008

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SOURCE: axu heat and outside blower fan run all the time

I can tell you exaclty whats wrong . and it sounds like multipart problems. you have an old RUUD heat pump and its reversing vavle is stuck. without that valve opening it will contantly try to run in refrigerant mode to make heat. and here its 26 degrees, het pumps are only made to be effiient in over 34 degrees and that why your electric heaters in the blower section in an in a closit of unit
continously running up you eectric bill big time. cuses for the reversing valve to stick are sitting along time when it was low on refrigernt. or ust plain shut depending on its age. that cicking is the relay trying to open or close the reversing valve swict to make pressure again. any local guy an fix that one. theyre are kits called hard start kits that they hook up to them that shoot an extra zap of jiuse in it to try to free it up if its not totally lockd up being though that you still hear the relays pulling in and out thats good you may have just caught it in time.

now here is a quick test and possible cure but only if you what your doing turn both units off take off the top cover of the old rudd and get a small hammer not a sledgehammer and rap and tap all around the reversing valve. it will be a cylindrical tube black usually have sets of copper or brass tubings going in the 2 sides of this so dont hit itthat hard it gets dents it and is ruined. look for oil spots which uually means the refrigerant leaked out , and its seized up for good. they try spinning around the big out door fan door fan some. you may have to rock it back and forth Till it braks lose but dont put super human efort int it,

than put it all bak together making sure you connected wires back up right. go in and have you wife eithe watch it or you do it and switch the breker on and off about 8 times to trying to get the cnnectors switches to stay in and if your brave take a well insulated screw driver and hold them in for 2-4 miuntes to force it to work. if that doesnt do it call your local repairman and tell him you need a hard startkit only much safer, the cost about 40$ but you labor will be high if he is sent alone so may you can help im out and lessen your bill if the valve cant be made to work again. you may want start looking for prices with that model and serial number and d shut that electric heater off some one to replace it . I hope I helped you out some no charge ( I dont have my Pay Pal acct. set up yet ) good luck tom.

Posted on Jan 12, 2009

  • 334 Answers

SOURCE: Bad sequencer or fan relay?

does ANYTHING come on when set to heat?

Posted on Mar 06, 2009

  • 3 Answers

SOURCE: Ruud Electric Furnace Cannot Reach Setpoint - "Watt Restrictor"?

unfamiliar with watt restrictors.
heat strips have 2 safety devices, a thermal overload, they get to hot they shut off, cause not enough air flow increase fan speed this device is auto reset. a fusible link a fail safe to thermal over load, no reset and sometimes replaceable. if this does not help would like to ask you a few questions. one of the buildings i take care of has 200 + reem/ ruuds all electric heat. if a part is defective replace, please do not by pass. safety frist.

Posted on Mar 07, 2009

  • 8220 Answers

SOURCE: ruud heat pump outside fan won't run

Tell him to make tight connections.

Posted on Jun 23, 2009

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2 Answers

Furnace fan will not stop running till you pull out fuse

Most likely the fan relay is defective or the electric heater is defective. If the fan will not turn off, the cause is generally the electric heat is being back feed from a defective heat strip., Recommend call pro. If so inclined, remove power, breaker etc find 1/4or 5/16 driver and Remove panel from the ah. Look for the fan and follow the wires back to the relay( this is usually black,for high speed, blue and red for low ) Follow the fan speed tap to the relay. If the relay is burnt or looks defective replace this part. If no defect is obvious remove the wire from the NC (normally closed) connection. Plug the power and check to see if the fan starts with out command. If the fan starts it definitely the relay. Note the wire removed from NC might be hot check with meter if it is and the electric heat is signalling the fan to run and most likely source of defect is the heat sequencers, (switch relays for high voltages) replace this part

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Wish I knew how old your furnace is. Let me answer your question directly. In the heat mode the fan runs independently from the air conditioning fan relay. Its either brought on by time or temperature. An old furnace will use a fan and limit control that uses a coil to sense the heat exchanger temperature and turn the fan on or off. Newer furnaces use a timer on a circuit board. 20 years or newer Ill bet its a timer board. Follow the blower motor wires back to the component and ill bet that's the culprit. Hope it helps. Good luck.

Oct 12, 2014 | Heating & Cooling

1 Answer

I have a coleman evcon electric furnace. The blower fan runs constantly, the switch is in auto and the fans runs even when the thermostat is shut off.

Most likely on that particular electric furnace you have a fan sequencer that is closed (stuck shut). It is the black relay that you are looking at when you take off the furnace cover to access your heat strips. You should have a red wire coming from the blower motor that plugs into the side of it. If you have a ohm meter turn power off and remove wire. Check resistance across the sequencer and it should read OL. If you have resistance across it, the relay is bad. Replace it.

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Our Fedders AirHandler Model#A24C1X keep 1 strip of heat when blower or nothing is on. have to unplug the red wire from NC on blower delay relay to stop it. blower relay Bd is new

Most of the time on Fedders unit one speed for heat comes off sequencer. This a low speed for heat. You may have bad sequencer. If your knowledge is limited about furnaces you may ahve to call service tech. But if you have some knowledge Replace the sequencer and follow woring diagram and you will be ok. Should solve problem. This time of year I replace dozens of sequencers due to this same problem. Rus

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It seems you need hands on servicethis time !
Bless You,
Please leave me a rating before you sign off!
Thank You

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