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.

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46k views

How often should I run a bleach and water solution through condensate lines?

How often do you need to run a bleach and water solution through the condensate drain lines (of a heat pump) to keep the bacteria away? What are the recommended parts (e.g. 1 part bleach, 10 part ...
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1answer
18 views

Is there a significant risk of CO2 buildup with a ductless heat pump A/C?

It just occurred to me that if I install a ductless heat pump to cool the air in my house's bedrooms in the summer, the unit will be cooling and dehumidifying the air - but not introducing any new ...
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1answer
2k 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 ...
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0answers
19 views

How to choose a good brand of heat pump? [closed]

I'm going to be installing a couple of heat pumps in my house mainly for cooling in the summer (I'm in the UK, and our summers are getting hotter). As far as I can tell there are several major ...
2
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0answers
13 views

Trane Weathertron Stat to Honeywell RTH2510

I have a Trane Weathertron thermostat thst I am replacing with a New Honeywell RTH2510. This is a heat pump with auxiliary electric heat. The wires on the Tran thermostat are. R, T, O, G, Y, B, X2 ...
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1answer
4k 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 ...
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1answer
498 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 ...
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1answer
167 views

Wiring 100-amp sub-panel for 1hp pool pump and heater

The project is to wire a 125-amp sub-panel from the main, approx. 50 feet away to serve a 220v in-ground 1hp pool pump, heat pump, and 120v LED pool light. Wondering if the following plan will ...
2
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3answers
189 views

Will a 2-stage heat pump cool my upstairs on low stage?

I am currently upgrading my furnace from an oil furnace/AC combination to all heat pump. I am considering two stage vs single stage heat pumps. I understand that two-stage will supposedly give me ...
2
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5answers
15k views

If my air conditioner return line iced over and the fan stopped, is it broken?

We've lived in our house for three summers and have never had any problems with the air conditioner. Today I noticed that there was ice on the coolant return line outside the house. I didn't think ...
2
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1answer
249 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 ...
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2answers
37 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 ...
3
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1answer
33 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?
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1answer
28 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 ...
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2answers
117 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 #...
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3answers
13k 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
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2answers
72 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 ...
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0answers
78 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 ...
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1answer
68 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 ...
0
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2answers
15k 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 ...
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1answer
109 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 ...
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1answer
442 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 ...
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1answer
482 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 ...
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1answer
37 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 ...
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4answers
3k 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 unit,...
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1answer
80 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. ...
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votes
4answers
311 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 ...
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2answers
7k 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 ...
8
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1answer
386 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 ...
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3answers
66 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 ...
2
votes
1answer
949 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 ...
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4answers
4k views

Gas heater not turn on, but fan-only still works when switched on from thermostat

my up-level heating system (gas heater) stopped working if the thermostat is at auto; fan can be on without warm air if switch the thermostat to ON from Aotu. Is this a thermostat problem or heat ...
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1answer
134 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 ...
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3answers
179 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, ...
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1answer
62 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:
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2answers
160 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" ...
2
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2answers
173 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 ...
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2answers
1k 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 ...
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1answer
282 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
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1answer
286 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) ...
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 ...
0
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0answers
191 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 ...
2
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1answer
480 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 ...
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1answer
132 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 hasn'...
0
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2answers
137 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 ...
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2answers
913 views

Is a PTHP an HVAC option for a super or well insulated structure?

Is a Packaged Terminal Heat Pump a good HVAC system for a structure that is super insulated or passively insulated assuming the unit is sized and fitted to meet the needs of the structure. There is ...
2
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1answer
439 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 ...
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1answer
716 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. ...
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2answers
201 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 ...
0
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0answers
123 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 ...