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Got a Ameristar heat pump thats 2yrs old. motor is running…

Customer Question
got a Ameristar heat pump...
got a Ameristar heat pump thats 2yrs old. motor is running and fan is running but not producing heat. unit is making a very loud noise.... i mean loud! has been doing this for a couple months and sometimes stops and works normal after doing it when first starting. noticed when its raining it continues to do it when the unit comes on. any ideas??
Submitted: 26 days ago.Category: HVAC
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Answered in 12 minutes by:
3/29/2018
HVAC Technician: gotoman for ac, HVAC Technician replied 26 days ago
gotoman for ac
gotoman for ac, HVAC Technician
Category: HVAC
Satisfied Customers: 5,314
Experience: 51 years of experience install design and repair of all makes and models of AC
Verified

Is the noise coming from compressor.

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HVAC Technician: gotoman for ac, HVAC Technician replied 26 days ago

Turn off the outside unit at the breaker. Restart and see if compressor makes noise. Those units have a scroll compressor and sometimes they will run backwards if power is umped. They will make a rattling noise and not heat or cool. Russ

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Customer reply replied 26 days ago
i don't know.... trying to upload a video for ya
HVAC Technician: gotoman for ac, HVAC Technician replied 26 days ago

Ok I will wait for it. Thanks

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Customer reply replied 26 days ago
cant get it to upload... file too big
HVAC Technician: gotoman for ac, HVAC Technician replied 26 days ago

Ok. Is it rattle sound. Russ

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Customer reply replied 26 days ago
done that 20 times
Customer reply replied 26 days ago
i don't know... sounds like it... my whole purpose of getting on here was to send a vid... can't do it but, i'm still trying
HVAC Technician: gotoman for ac, HVAC Technician replied 26 days ago

I will opt for another Expert

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Customer reply replied 26 days ago
http://www.youtube.com/watch?v=rt0sQSUcrg0
Customer reply replied 26 days ago
see if you can see it now
HVAC Technician: Phil, Mechanical Engineer replied 26 days ago
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 9,316
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial
Verified

Hello, that sounds like it could be the fan hitting some loose wiring... stop the unit, and use a towel to jam the fan blade and restart the unit after you wait 5 minutes, if the noise ceases, its something hitting the fan blade.... if the sound persists, its a compressor problem and we can dig into it.

DO NOT LET THE UNIT RUN MORE THAN 5 SECONDS WITH THE FAN JAMMED... THAT IS A BRIEF TEST ONLY.

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My goal is to give you the best experience possible! I hope I have earned a 5 star rating! Please remember to rate my service by selecting the 5 stars at the top of the screen before you leave today.

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Customer reply replied 26 days ago
not putting out any heat though
Customer reply replied 26 days ago
still doing it
HVAC Technician: Phil, Mechanical Engineer replied 26 days ago

Thanks, ***** ***** still making that noise with fan blade not spinning, then the problem is with the compressor, compressor in that case is most likely bad (95%)... OR 5% chance running backwards.. very unusual on a single phase system.

.

If you have a clamp around amp meter, and a set of refrigeration service gauges I can coach you on a further diagnosis. If not, tell me which direction you are from the center of the nearest town or city and I will see if I can locate a well rated service outfit for you.

.

We can go from there without any time limits

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Customer reply replied 26 days ago
is it possible that the run cap is only hitting half charge??
Customer reply replied 26 days ago
when it's dry outside it only does it when its starts for about 5-10sec.... now that it has been raining it continues to do it the whole time it's on...
Customer reply replied 26 days ago
i did meter the cap
HVAC Technician: Phil, Mechanical Engineer replied 26 days ago

Run capacitors generally fail like light bulbs, suddenly and completely, rarely they get weak, but this will not cause the compressor to run backwards.

If you measure its microfarad rating and its more than 10% low, you can try replacing it, its a bit of a long shot though (one chance in 50)

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Customer reply replied 26 days ago
it was pretty much on the money
Customer reply replied 26 days ago
what about the moisture though... don't ya think it's a lil odd??
HVAC Technician: Phil, Mechanical Engineer replied 26 days ago

WHere is the moisture exactly?

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Customer reply replied 26 days ago
outside raining..air
HVAC Technician: Phil, Mechanical Engineer replied 26 days ago

Rain will not cause these sorts of problems

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Customer reply replied 26 days ago
Well for some reason it stops making the racket when it quits raining... and continued to do it when it’s rainy.... been doing it for 2 months
HVAC Technician: Phil, Mechanical Engineer replied 26 days ago

Thanks, that much noise caused by rain is unusual, I have never seen that sort of noise caused by rain before in my 58 years in the business.

.

From your earlier comment, it cal also make that noise when its not raining, so rain would not be the cause, Look for some loose wire under the fan blades that might be hitting the blade.

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Customer reply replied 25 days ago
no longer raining.... check this out... http://www.youtube.com/watch?v=ASmlZJjbl4g
Customer reply replied 25 days ago
http://www.youtube.com/watch?v=ASmlZJjbI4g
HVAC Technician: Phil, Mechanical Engineer replied 25 days ago

Thanks, ***** ***** an intermittent problem that has nothing whatever to do with the rain, or its rain noise, So far I do not think its rain noise,

Is the unit heating or cooling? Feel the largest copper tube (3/4" in diameter insulated) tell me if its cool or hot

We can go from there

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Customer reply replied 25 days ago
It is heating and blowing warm air out of the furnace the line is warm
HVAC Technician: Phil, Mechanical Engineer replied 25 days ago

The line should be hot in heating mode, not just warm... try it in cooling mode for an hour and tell me if the line gets cool or sweats..... if it does not get cool enough to sweat then there is a problem with the compressor or its low on refrigerant, keep an eye on it regarding the noise, and stay in touch,

.

Its time to rate my input for the day, that gets me paid, locate the "finish and rate your expert" link near the top of the page and click on it. I will appreciate that very much.

I am in every day from 9 am to 11 pm west coast USA time to do any follow up, including coaching, training and repair advice as needed.

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