No heat, room temperature air from vent


  #1  
Old 01-22-16, 08:42 AM
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No heat, room temperature air from vent

My inside and outside unit (heat pump) has been running all day and night, but the temperature keeps dropping slowly. The air from the vent feels room temperature instead of heated. Also, my thermostat is displaying AUX. This been going on for a week, and my A/C guy still hasn't showed up.

I was told to switch the Hunter thermostat to ON position, that will turn off the outside unit and use the heating element instead. Tried it, but still no heated air.

Following online tutorial, and removed the heating element (photo below) and tested good. Resistances across each coil reads about 11 ohms, and the sensor (circled red) terminal A-B reads about 1 ohm.

Next tutorial is on Heat Sequencer, but I can't find it in my unit. Does the heat pump units don't have it? If the air is not hot, then it's likely the heating element is not getting the juice? So will it be this controller issue?

Thanks.

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  #2  
Old 01-22-16, 09:16 AM
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I can't help you but the first thing people are going to need to know is the manufacturer and model number of the air handling equipment.
 
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Old 01-22-16, 09:50 AM
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While the heating element was removed, I cleaned it. It had so much crud built up on those ceramic spacers.

I found the heat sequencer, and will be testing it shortly after lunch.
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Inside unit is York model F2RP042H06B
Outside unit: Goodman model GSH130481BB

Inside unit:
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Outside unit:
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Last edited by itchibahn; 01-22-16 at 10:22 AM.
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Old 01-22-16, 11:04 AM
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Turning the stat to ON will only keep the blower running. Does your stat have emergency switch?
 
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Old 01-22-16, 11:07 AM
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According to the tutorial, there should be continuity between the terminals on heat sequencers. I checked all combination of two terminals, but they are all open. According to the tutorial, it's defective when they are open.

For heck of it, reconnected all the wires and power it up, and wolla, I got hot air. It took less than 3 minutes to heat up from 70F to 73F, then went off, the way it used to be before my A/C guy replaced the condenser unit about a year ago. Monitoring it every time it comes on, I noticed that AUX comes on randomly. I'm assuming that's normal considering current outside temperature being 47F?

So the two heat sequencers are working although they show open? Perhaps, I'm not measuring them correctly? Or, they have intermittent issue? Maybe the cleaning the heat elements did it?

We'll see how long this fix last.
 
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Old 01-22-16, 11:13 AM
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@skaggsje; So the heating elements and the condenser don't get turned on? No, my Hunter thermostat doesn't have an emergency switch. Just Cool/Off/Heat and Off/On.

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  #7  
Old 01-22-16, 11:22 AM
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At 47* I wouldn't expect the heat strips would be coming on. Is your heat pump running? If it is lightly touch the larger copper tube where it goes into the furnace. It should be warm or maybe even hot.
 
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Old 01-22-16, 11:54 AM
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Condenser is on, and the coil is slightly warm. Currently, the AUX is not on. I will keep it monitored to see outside temperature when the AUX comes on. I did notice earlier this morning, when it was about 41F, the condenser had slight frosts.
 
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Old 01-22-16, 01:16 PM
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OK, I should have mentioned that aux will come on when it goes into defrost mode.
 
 

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