Having problems with your Air Conditioners ?

Blower fan stays running. Fan relay attached to small circuit board (coil tabs [timer?]). Capacitor on small circuit board had ''fallen out'' of ic board. Tried to get replacement board, and was sold just a standard relay - told that relay alone replaced the previous relay -and- circuit board configuration (?). Problem still exists (no change). Also changed thermostat just to eliminate as a possible cause, but seems like problem must be in the fan relay area. Question about the wires attache

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Blower fan stays running. Fan relay attached to small circuit board (coil tabs [timer?]). Capacitor on small circuit board had ''fallen out'' of ic board. Tried to get replacement board, and was sold just a standard relay - told that relay alone replaced the previous relay -and- circuit board configuration (?). Problem still exists (no change). Also changed thermostat just to eliminate as a possible cause, but seems like problem must be in the fan relay area. Question about the wires attache

... Carrier Air Conditioners

I have a duo-therm thermostat that I think is the problem. My a/c only works when the fan is swithced to the on position but does not work in the auto position, also the heater does not come on and work unless i tie a jumper line to the ground wire. I have been told that the problem could be the thermostat or the circuit board in the a/c. If I can I would replace the thermostat with a digital.

Try changing the thermostat out first. Make sure that you set the set switches in the thermostat for the proper medium you are using. If the unit is heated with gas make sure you set the thermostat settings for gas ( there is a small switch inside ... Dometic Rooftop RV Air Conditioner

A Nordyne air handler, model B3BV-030K, with 4 wire thermostat. Thermostat and AC works fine in "cool". Switch it to "heat" and nothing happens.No fan, no heat.(I have built in heat strips -resistors). I jumpered (on the nordyne circuit board-input from thermostat) from R to W. (24 volts from R to W, which should start the heater. Nothing. No relay "click" like when AC comes on. If i jumper R to Y, AC comes on ok. Does this sound like a relay gone bad on the circuit board? Or what? If relay bad,

Do you get heat when you jumper R, G & W? ... Ruud Central System Air Conditioner

Ruud furnace Model UGPH-10EBRJR Silhouette ll. blower fan stays on continously, (also draft blower) and the only way it will shut off is to disconnect power. I've replaced thermostat, fan limiter switch, switch on the blower housing, even replace circuit board (IFC). I've even disconnected the thermostat wires to circuit board and blower still comes on as aoon as power is connected. I've disconnected everything on the circuit board except for blower wires and 24 volt transformer and it still com

... Air Conditioners

HI, I had a gas furnace (GOODMAN GMP125-4).When i turn heat on from thermostat, the burner is not light up, the induction motor is not running. I took off the panel and I also found that the status light (red light)on Circuit board is NOT on also.Is this a circuit board problem or thermostat problem?

... Air Conditioners

I was expecting to find this relay. It's not there. My unit has a rather complicated looking circuit board. The circuit board seems to have been made by Emerson Climate Technology. On the top edge of the circuit board is printed "Climate Talk" and the number "4672H". There is also a Bar Code sticker affixed to the circuit board that bears the number 11014630400034. Where do I connect the thermostat wires (red & white)?

This board needs a 24 volt supply run from the furnace to power up the communicating board\015\012check your wiring diagram on the inside of the panel this will help you ... Amana Air Conditioners

My fan on my amana furnace runs all the time> it is not the thermostat so it must be a fan relay> i have a circuit board > do i have to replace the whole board or is the relay located elsewhere

Check your thermostat setting on the fan, or you have a stuck relay ... Amana Air Conditioners

Dometic Duo therm RV a/c rooftop unit. 15,000 btu with heat pump. model 620515. age 5 years. Problem- will not always stay ON. Starts and cools fine. but shuts off within 5 mminutes sometimes.. or will run for hours and hours with no problems. when it stops, I can sometimes restart it by cycling thermostat.. if that does not work I can unplug thermostat from 12v power and then it starts when asked to. Have replaced computer circuit board and wall thermostat.. no change.

... Air Conditioners

I have a suburban lp furnace and duotherm air/heat pump roof unit. duothern thermostat. 20 amp breaker kicked ( reset breaker) & furnace quit. NOW furnace fan comes on but does not light, and the front AC will not work either, when in the COOL position on STAT the unit blows warm air instead of cold. I replaced the Thermostat and a Tech guy checked the board in the furnace and it was OK. He also switched the board from the rear air with the front and nothing changed. Rear air and heat pump works

I'm not sure what the problem may be but you could try calling All\015\012Seasons RV Appliance Parts & Service. There number is\015\0121-800-344-0673 they have helped me in the past. That and there tech\015\012calls are free so it wouldn't hurt ... Dometic Rooftop RV Air Conditioner

Carrier 48nmx030 heater does not work. A/C does. Fan does. Bypassed thermostat and changed settings on thermostat to engage the unit. Main circuit board clicks suggesting that the switch on the board is functioning. There is no response at the igniter module at all. Could the igniter module be defective? There is no attempt by the igniter module to self start the heater.... no clicking or gas movement.

Yes it is most likely it has gone out.The igniter is usually the first thing to go.Moister and heat take a toll on the unit.You need to put a volt meter,(at least 24 volt).Not knowing the volt,off hand 12 or 24 volt,but the volt meter gauged for at ... Air Conditioners

No heat I have problem with a carrier heat pump / AC the fan inside work and the air is circulating but no heat is coming out, only heat with the emergency heat come on, also the fan outside works, I change the thermostat by noting change.

Your compressor sounds like isn't working? And the problem is if we are lucky you just lost the capacitor. turn off the breaker to the ac/heat pump unit. Open the electrical panel on condenser locate the capacitor if it is swelled up like puffed u ... Carrier 38BRC048 Air Conditioner

How to change 3 wire motor with 4 wire motor for outside ac unit fan motor?....old motor had blk wire going to a circuit board, also pur wire going to c terminal on cap, also brw wire going to f terminal on cap...... new motor , on the name plate , shows blk and wht wire going to line. also brw and brw/white stripe wires going to cap.... does the blk go to the same place as the old blk and the white does it go to the other line wire coming off the contactor? also which terminals do i attach t

You need this wire onto the "F"terminal- fan terminal as this is a 230 volt condenser fan motor all your doing is parrelling the cap ... Air Conditioners

Indoor fan motor continue to run even if the thermostat is in auto position with the cool and heat switch in the off position. The furnance don't have a fan on and off switch in the furnance like most. The only way to turn the fan motor off is to turn off thr high power switch. I change indoor fan relay but the problem still exist.

Try this, disconnect the fanwire (green) on the furnace, if it shuts off then the hot wire from the thermostat is touching the green wire or bad thermostat. Thank-you-very-much! ... Intertherm Air Conditioners

When i turn my a/c (goodman) to auto and to cool, nothing is working.and when you go outside by condenser unit and manually push the relay in it trips the circuit breaker. is there any short somewhere or am i not supposed to do that. also i found a blue wire thats connected to the relay had been caught between the covers that have chafe through. is this wire for a thermostat and had cause something not to work. these wires are connected to a small red & white wire. any info would helpful. th

First stop pushing the contactor in if it tripped the breaker than you have a short and it need to be checked out the small wires are the t-stat wires could have shorted the control tranformer have the system looked at by your hvac people dan ... Goodman Air Conditioners

Air conditioning unit not running but fan keeps running even though thermostat is turned to off, auto, and temp set to highest position 90degrees. 3 amp fuse keeps blowing on the circuit board in the blower compartment. I replaced it 3 times then installed a new thermostat. no change. I can usually figure it out if I got a little input or direction. Any help would be deeply appreciated. I would much rather have a trained expert easily repair my hvac unit but I can only call the professionals in

If the fuse is blowing then this is generally indicative of a short in the low voltage wiring, isolate the wires on the thermostat and the unit ends, use an ohmmeter to verify that there is no path for continuity with no wires touching, if there is t ... Air Conditioners

My blower flutters off and on when it is close to the time for the auto shut off. This problem does not seem to happen much during the daylight hours. I have changed the thermostat, and checked the wire connections. What is next, the circuit board? Model GMP075-4 This is with the A/C running

Unfortunately the circuit board is the next part on the list to change as the relay that controls the blower is integral to the board. Before changing you need to verify that the relay ?board is the problem, this can be acomplished by using an ammete ... Air Conditioners

Carrier oil furnace model 58BMA155-20(FORCED HOT AIR)i had changed the blower motor & honeywell st9103a128 fan control board.now the blower motor won't shut off until the breaker is turned off.i disconnected the thermostat an it's still the sameway.fan control board was replaced with a honeywell st9103a1002 board.blower motor was replaced with a 3/4 hp universal motor.i also have central a/c.

To have your work constantly the fan or the board has a problem communicating with the new fan or if outdoor ... Carrier XHB123D X/Y Series Heat/Cool Air Conditioner

The fan on my duotherm a/c doesn't work. I can hear the compressor come on but the a/c doesn't blow any air. There was a fairly loud pop when it quit working. Am I looking at replacing a condenser or relay or circuit board or something else? Also the compressor will come on occasionaly when the furnace is on.


My coleman Evcon model DGATO70BDC 1994 starts up and then locks out. The pilot lights and then furnace runs for maybe 2-5 minutes and all that is still running is the air chamber fan. I am thinking of just replacing all parts that could be responsible the problem. There's not much there as probably you know. There is no circuit board just basic electronic ignition,relays thermo senors and etc.. Any help would greatly be appreciated. James

Does your furnace have an air flow sensor? Blowing out the lowest tube will sometimes clear it and allow your furnace to operate. Lack of differential pressure across the burner will cause a lockout. ... Air Conditioners

I was running the genarator with the a/c on and the genarator stopped with the a/c on.No power to the a/c. I plug in the motor home to 120 current and tried the front a/c and the compressor comes on without the fan when the thermostat is in off position. the only way I can shut it off is change the switch to rear air position. I check the fuses and circuit breakers and all are ok It seems to me maybe a relay is sticking. what can I do John

You are right! When thermostat off, no out door fan or compressor should run in out door unit. Replace Compressor contactor relay immediately Thanks. Helpful?. ... Dometic Rooftop RV Air Conditioner

Older Sunbeam Heat Force 85,000 Btu, LP salamander heater with a spark igniter, small sealed circuit board, asco red hat gas valve and temperature switch. The temp switch is an Elmwood L295 1/2" diam. surface mounted ceramic, 2-terminal sensor. The Asco valve is a Red Hat normally closed gas 110v, 10.1 watt valve. On/Off control is a toggle switch. The problem: I turn the unit on....fan starts, gas valve opens, spark igniter light flame....all good for 15-20 seconds. Then the gas valve shut

Hi,The problem is that whatever is sensing the flame is not telling the control that the flame is on...Not sure what you have on that unit, but I suspect that it is a photocell that sees the light and then tells the board that there is fl ... Air Conditioners

Hello my air conditioner is not blowing cold air. It seems like only the fan is working. I set the temp to between 16-18 celcius and the temp that is showing is 28 celcius. Also is showing E5 on the ac small screen. It was serviced about 3 weeks ago and was working fine. This problem started about 2 days ago. Nothing has changed and nothing has been tampered with. Hope you can help Thanks :)

What did they do when it was serviced?It sounds like there may be a leak if it does not get cold at all anymore.Although,lasting 3 weeks,depending on how much you used it,it would be a very tiny hole leaking.The other most likely suspect would be the ... Air Conditioners

Hi, I have a Britony Combi SE. I have had a persistent problem whereby I am presented by fault lights 40-80. I am aware that this is a common fault and usually relates to water pressure. That has been tested and not the problem. In an attemp to fix the problem the engineer has changed a printed circuit board which again hasnt fixed the issue, what is happening is that on the circuit board there is a 3amp fuse which keeps blowing. The problem is we don't know what is causing this. Can you help?

... Air Conditioners

I have an old Ruud(ac/heater)top house. Maybe 20 years old. the fan extracting hot air from coils sometimes stops working and the unit does not cool. I called a local repair man and he changed a small module of some sort. he said it was the problem. two weeks later the samething. I believe he's an idiot and im relectant in calling another repairman. I went up and with a small screwdriver i gave the fan a little push and it began to work. Can the fan motor be the problem?

Agree, this clearly is a fan motor problem when pushing it made it run.Most fans that have the same issue may need bushing / bearing replacement. and if that did not resolve the issue, then a recoil will surely put the rotating power bac ... Ruud UAKA060 Air Conditioner

I have a remote comfort control with 3308448.004 relay board. Press Heat button to turn unit on and it does NOT turn on. Have 115VAC to the relay board and have 12VDC to remote control reciever. Sounds like the remote control reciever is bad?? Can I switch my system to the "wired" control system without changing the relay board? I assume it is possible that the relay board is also bad. Is this a common fault with these units?

... Dometic Rooftop RV Air Conditioner

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