The heat-pump is a type of central heating system that extracts heat from the outside, reversing the process used by a central air system.

learn more… | top users | synonyms

2
votes
1answer
20 views

Will emergency heat hurt my heat pump during defrosting?

I am using my emergency heat during the defrosting stage of my heat pump. Is this all right? If not, what can I do while it's defrosting?
0
votes
1answer
18 views

Wood stove and heat pump combo

I am contemplating the following design: A house has a primary electric heat pump heating setup consisting of an outside heat pump, inside air blower and all the duct work that distributes warm air ...
1
vote
2answers
41 views

Optimizing heating in a heat-pump + electric resistive system

Outside, I have a LENNOX 13hpx-036-230-17 compressor: Inside, the air handler is a LENNOX CBX25UH-036-230-1: The air handler lists 36,000 BTUH cooling capacity, with r410a at 450psi, cust part ...
0
votes
2answers
36 views

Are my heat pumps using the right amount of power?

I'm trying to figure out if our two heat pumps are being power hogs and if there is something to do about it, or if they're operating normally. We bought our home recently and haven't been in it but a ...
0
votes
0answers
55 views

Why would my heat pump AUX be kicking on with 1 degree change?

So this is weird, and I literally just noticed it today. I have a Honeywell 5-1-1 Day Programmable Thermostat – RTH6450D. That works fine, I have a heat pump system (Carrier 2-ton). Today for some ...
1
vote
1answer
21 views

Whole House Humidifier on All-in-One Heat Pump and Freezing Temps

How do I install a whole house humidifier on an all-in-one heat pump in an area where we have freezing temperatures during the time of year when you'd want to use a whole house humidifier. An HVAC ...
1
vote
1answer
39 views

How to wire programmable thermostat that doesn't have an E termimal

I am trying to replace a manual with programmable thermostat that is missing emergency heat (E) terminal. There are bits and pieces of information I have gathered but am still not clear. Can I leave ...
1
vote
1answer
53 views

Is this 230v motor wired for 115v operation

I have the following wiring diagram for the motor I am replacing. After looking at the wiring as shown here, I see one black and one purple wired to the terminals. There is a second set that is ...
2
votes
1answer
34 views

What is required for seasonal maintenace of a heat pump?

Over the years I've had several local HVAC companies provide seasonal maintenance of the heat pumps and propane furnace in my house. It seems that every technician--even within the same company--does ...
1
vote
1answer
166 views

AC Blower running very slowly

I have a Ducane heat pump. When running in AC Mode, the outdoor fan and compressor kick off just fine. The blower fan seems to kick off as well, though it's not putting out very much air. I can ...
2
votes
4answers
254 views

Can a homeowner without a Section 608 EPA license legally connect his own gauges to his own air conditioner if the unit uses 410a refrigerant?

It has been suggested by at least one moderator on this site that EPA Section 608, which restricts who can purchase and handle refrigerant, including who can connect a set of manifold gauges to a ...
4
votes
4answers
221 views

Is transitioning to all electric heating smart?

I am in the process of overhauling my home heating and plumbing. I bought a 2600sq/ft 1980s Cape Cod in southern Maine on the coast. I've reinsulated the walls and roof and am continuing to make ...
0
votes
3answers
64 views

How should I install a new water heater?

I have recently shifted to San Diego. I am planning to install my own water heater. Can anyone guide me on below questions: Should I place my water heater next to furnace? Should I have a common ...
8
votes
1answer
215 views

Rheem Heat Pump A/C Mode Delay Cycle In Hot Weather

I have a Rheem 15PJL48A01 heat pump which has been working correctly for years, and is maintained properly. It is hot here currently and so it is operating in cooling mode. Yesterday and today, it ...
1
vote
1answer
65 views

What is causing this air-conditioning unit to cool on cold days?

This is a temperature log from a reverse cycle air conditioning system that has run fine for getting on for 30 years. It has suddenly started to blast out cold air on days when it should be heating. ...
1
vote
3answers
131 views

How to hook up a 240V 50Hz heat pump to 60Hz

I am facing a challenge: Every EVI (-25C outside) air to water heat pump system seems to be 240V/1Ph/50Hz (and 1 exception I found so far: 240V/1Ph/60Hz, however with extremely limited information, ...
0
votes
1answer
51 views

Condenser, (heat pump) covered in pollen - does it need to be vacuumed - pic attached

So my Condenser, (heat pump) is covered in pollen - does it need to be vacuumed or will the wind/rain take this away naturally? Here is what it looks like:
0
votes
1answer
199 views

Does an outdoor AC condenser unit (Heat Pump) require lubrication? Pic included

I have been in my house for 11 years now and every 3 or 4 years I have been taking the lid off my condenser unit and lubricating it. I just don’t know if I am even supposed to do this, but it make ...
1
vote
1answer
319 views

heat pump/air conditioning wiring to thermostat

We decided to change the thermostat of our heat pump/air conditionnning unit. First 3 images are the old unit. The first 3 wires(1 and 2 picture) yellow red orange were not connected to anything, just ...
2
votes
1answer
190 views

AC not cooling using heat pump

I just bought a house and this is my first experience with using a heat pump. I have put in several hours of research and understand how it works but I need someone that has experience to give me some ...
2
votes
2answers
104 views

Emerson Liebert Air Conditioner Fan Runs Abnormal

We have 2 Emerson Liebert air conditioners inside a datacenter. Issue is not a home issue but devices are all same and I supposed finding some expert here. Here is the thing: This 2 devices are ...
0
votes
1answer
128 views

What if my Trane 3 ton 13 seer heat pump is unable to generate enough heat to reach the set point on the thermostat?

The unit turns on when thermostat temperature is set higher than room temp. It blows cool air for several minutes and then the emergency heat kicks on and warmer air comes from vent. This lasts for ...
0
votes
0answers
161 views

Why is my gas pack not working?

I just got my gas pack filled and its not blowing out nothing but cold air and the house is freezing extra cold now. Please tell me what's wrong just spent a lot money getting it filled now its not ...
1
vote
1answer
184 views

How to determine if my heating & cooling system is adequate for my home?

Is there some kind of calculation I can follow to determine if the heating and cooling system in my home is rated (adequate) for the size of the house? I assume there is some way to say something ...
0
votes
1answer
212 views

Can you vent electric dryer into furnace return?

I've got an electric dryer currently vented outside: Behind the door to the right is our heat pump furnace: I was thinking about, during the winter, venting the dryer (properly filtered for lint) ...
0
votes
0answers
94 views

Buying used heat pump/AC

I'm planning to buy and install a used heat pump/AC at some point in the near future (probably looking for sellers on Craigslist or similar), and want to know what I should look for to know if the ...
0
votes
2answers
151 views

Newby Heat-Pump question - runs in the winter?

This is a super NEWB question but - I have just bought a home with a "heat pump" and it is running all day and night (in the dead of winter), some of my neighbors have their "exterior boxes/units" ...
0
votes
2answers
109 views

Rheem RPLB-030JAZ - is it a Heat Pump or AC unit?

I recently purchased a home that came with a "heat pump", however when I look on the box outside my house it says: Rheem Air Conditioner Model RPLB-030JAZ I cannot find anything on this when ...
2
votes
1answer
671 views

Why does my heat pump keep triggering the high-pressure cut-off?

Our Rheem heat-pump is on the fritz. It keeps triggering the high-pressure cut-off on the outdoor unit. We've had problems with this happening before, but only when the outside temperature got to ...
1
vote
2answers
910 views

Home heating fuel comparison (wood and heat pumps)

I'm investigating the most efficient way to heat my new 2000 sq home in New Hampshire and am having some difficulty working out the math based on the numbers I have found. I've found that wood is ...
2
votes
1answer
364 views

How do I determine/control which heat source is used (heat pump, oil)

I have a heat pump and an oil furnace for backup. How does the HVAC system know when to use the heat pump and when to use the oil furnace? Specifics: I have a Honeywell TH8320U1008 thermostat ...
1
vote
2answers
4k views

Air handler condensation draining problem

For the life of me, I cannot figure this out. My air handler and heat pump were installed in 2006 and work great. For the first summer since I've owned the home, condensation started to not drain ...
1
vote
1answer
445 views

What could cause a heat pumps line sets to be the same temperature when running?

The symptom I'm dealing with is that the heat pump system isn't cooling as much as it should. Tested it today, was about 79°F inside and outside; system was blowing air at about 73°F. ...
2
votes
1answer
313 views

Will a single ductless mini-split heat pump be able to distribute its air evenly throughout my ranch house?

I am in the middle of a deep energy retrofit of my house, and a quick-and-dirty online manual J calculation of the projected loads once my projects are completed shows an estimated heating and cooling ...
0
votes
0answers
96 views

Are wall air vents a potential problem?

A house I'm looking at has A/C vents in the walls, rather than in the ceiling or floor. I've never lived in a house with air ducts in the walls. Can I expect to have problems? The house was built in ...
0
votes
2answers
173 views

Heat pump vs gas efficiency and comfort [closed]

I'm looking for a house to buy in the South Carolina low country, where average lows in January get down to just under 40 deg F and highs in the summer get to just over 90 deg F. The houses in that ...
1
vote
3answers
11k views

How often should heat strip turn on for a heat pump unit?

I have noticed my heating bill is higher than my cooling bill now that I have installed a Heat Pump. I am trying to find a way to reduce this winter cost but am not sure how often electrical heat ...
0
votes
1answer
2k views

why does my heat pump wiring diagram show 7 wires going to the thermostat but the thermostat only says it needs 5?

Here is a link to the wiring diagram for my heat pump. The thermostat that I am planning on buying has the following terminals C, G, Y, O/B, RC, R, Aux, E, and L. The instructions say to jump the RC ...
2
votes
1answer
256 views

Is my Heat pump and gas furnace installation incorrect?

I moved into a house about 2.5 years ago, and the previous owners had a heat pump installed, together with a gas furnace. Recently I had my furnace repaired (faulty igniter) and the HVAC technician ...
3
votes
2answers
7k views

How can I protect a heat pump from heavy snow?

I have an Carrier air heat pump at the back of my house (installed 1 year ago). It is generally fine and stays defrosted with the smaller amounts of ice/snow. With a larger amount of snow, should I ...
2
votes
2answers
73 views

Is it normal for actual temperature to be below target temperature during cold weather?

I live in North Florida and the temperature seems to drop into the 30's maybe 10-15 days out of the year and the 20's maybe 2-5 times a year. We had a few days where the highs were in the 30's this ...
2
votes
1answer
456 views

Breaker box or heat pump problem?

We ran our forced air heat pump today. 15 min. in we noticed it just stopped running. Looking in the breaker panel I could see that the breaker for the heating unit had tripped. When I tried to ...
1
vote
1answer
406 views

Why does the blower in the attic vibrate during heating when it is really cold?

We have a Carrier heat pump system in our home, and the blower is located in the attic. When it is especially cold, the blower runs on high (there are three levels: high, medium, low). During this ...
1
vote
1answer
113 views

Heat pump - outside unit fan not running

we recently had an ice storm in the DFW area. Our outside unit is in a shady area that hasn't completely thawed out yet. Therefore, we have significant ice around the unit (and even inside) that ...
0
votes
2answers
14k views

How can I prevent my outside heat pump coils from icing over?

My outside unit is on the north side of my house and under an area that water drains to. I have put up gutters and placed a small roof above the unit, but still the coils freeze up during winter. I'm ...
0
votes
0answers
34 views

Is my heat pump's condenser fan motor bad? [duplicate]

The other day my AC stopped working. I'm thinking the condenser fan motor has gone bad (unit is ~10 years old). Here is what I did to troubleshoot which led me to believe it was the fan motor. ...
2
votes
2answers
263 views

Why is my AC suddenly *heating* my house?

I have a 13 SEER heat pump about one year old. Everything's been working fine, but the AC suddenly started heating my house spontaneously (no changes to thermostat, etc). The outside ambient ...
1
vote
1answer
295 views

Replacing Oil Furnace with Heat Pump

My wife and I would like to remove the older oil heat from our home and replace it with a heat pump. We currently have an Amana central air conditioning unit (3 ton), and an oil furnace in the ...
1
vote
1answer
3k views

Can I replace an air exchanger with a heat pump?

In my basement I have a rather large Air Exchanger: I have heard that if I install a heat pump I may be able to replace the air exchange. This gives me two benefits that I can see: The Heat Pump ...
0
votes
2answers
2k views

Does reverse-cycle airconditioning in heating mode dry the air?

I understand that when cooling, an AC unit condenses water vapour from the room, and results in dehumidified or drier air than outside. When in heating mode, I would expect this not to happen, as the ...