Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

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.

0
votes
1answer
17 views

AC \ Heatpump radiator corrosion

The example, from another posting, shows radiator corrosion. My heat pump's radiator is so corroded that it is unable to radiate heat and now the heat pump must be replaced. What preventative ...
0
votes
0answers
17 views

Troubleshooting remote AC (heat pump)

BACKGROUND The system was working well in July: 6AM: AC turns on and reaches target temperature of 77 deg ISSUES Although it is a heatpump in cooling mode, I will refer to the system as an AC for ...
0
votes
0answers
17 views

What performance or efficiency advantages are there in practice for command-modulated inverter heat pumps vs. self-modulated units?

Inverter technology has caught on in the North American heat pump market, with most major HVAC manufacturers offering the feature not only in mini-splits, but in traditional split system ...
1
vote
1answer
96 views

Generac Generator with Carrier Infinity Heat Pumps

I've signed a contract to install a Generac 22.5 kW whole house generator and transfer switch in our home outside Boston. Our home has Carrier Infinity 3 ton heat pumps installed on the first and ...
0
votes
1answer
96 views

How can I tell if my new AC is overloading my home electric service?

I just installed a mini-split A/C system. It is 2 outdoor compressor units and 7 indoor head units. (I did 95% of the install myself, toot toot) It was working great, but the weather had been ...
0
votes
1answer
50 views

Efficiency of having 2 heat pumps in my house

I have a 2 story house and I want to replace our old window AC. I was initially thinking of replacing it by a single heat pump unit, but in order to get government funding, I would need to get one ...
0
votes
0answers
24 views

Minisplit Maintenance Issues

I have a Daikin 12kBTUH minisplit heat pump installed in my 1 BR 480 sq ft apartment in North Florida. It heats and cools and is very quiet. Our electric bills average betweeen $45 to $70/mo. ...
0
votes
1answer
26 views

Help wiring thermostat for heat pump

I'm replacing an old thermostat with a slightly newer thermostat. It's connected to a heat pump and the old wiring (picture attached) was: White = W2 Yellow = Y Brown = O/B Red = R Green = G Blue = C ...
1
vote
0answers
110 views

How does one set the temperature threshold for heatpump? Carrier Infinity

I've just had a Carrier Infinity heat pump installed, with the matching smart thermostat. The only problem with it is that while it has three settings for the heat source: Heat pump only Electric ...
2
votes
1answer
115 views

Coleman 6230-901 outdoor unit fan running slow (and continuously)

I have an old rental mobile and the heat pump is operating normally, except the outdoor unit fan is running all the time (unless the breaker is off), and it runs very slowly. The run capacitor ...
3
votes
1answer
54 views

Heating the cold exhaust on heat pump

I'm honestly kinda surprised that nobody has tried that (at least, my Google Fu failed me in finding someone that did). I just bought my first home and noticed something. My outdoor coil for my heat ...
1
vote
0answers
1k views

Honeywell RTH6500 WiFi Thermostat wiring questions for a heat pump

I'm trying to install a new Honeywell RTH6500 thermostat on an old heat pump system that has regular plus emergency heat and the closest matching diagram says to put both the white "W2" wire and black ...
0
votes
1answer
36 views

After market air filter replacment

I have a Lennox heat pump which has an air handler with a Lennox X7935 Carbon Clean Healthy Climate MERV 16 Filter installed. These filters are like $105 per at least. When we purchased this whole ...
0
votes
3answers
169 views

Why don't heat pumps run for a bit BEFORE starting the air circulation fan?

I'd like to think I understand how heat pumps work decently well. My home has one plus electric heat, which I try not to resort to because heat pump is more efficient, if slower. When a traditional ...
1
vote
4answers
110 views

Will heat pump heat home faster than space heater?

I know that a heat pump is cheaper to operate than an electric space heater, but I'm wondering if a heat pump will heat our home faster than an electric space heater. I'm asking because I have an ...
0
votes
1answer
57 views

Must a 4 ton variable speed air handler use a 4 ton heat pump?

This is an air conditioning question: Must a 4 ton variable speed air handler use a 4 ton heat pump or can a 3.5 ton heat pump or smaller size heat pump be used instead?
1
vote
4answers
66 views

How to bypass this component to a Tetco Heat Pump

I have Tetco Heat Pump system that came with my house when it was purchased. About a year ago, I started hearing a water hammer in my pipes that I traced back to the solenoid(?) in the picture below. ...
1
vote
1answer
325 views

Air handler turns on even when set temp is reached

My HVAC is a heat pump system, the air handler inside is a Goodman aspf183016ea. The whole system/house is about 3 years old, and is all electric. I recently moved into the home and noticed that the ...
0
votes
1answer
32 views

Is this humidifier properly installed?

Has anyone seen a humidifier installed this way: humidifier installed to side of air handling unit (hole drilled into side of AHU and discharging humidified air directly into the AHU). Always thought ...
3
votes
1answer
85 views

Is there any significant loss of cooling efficiency to wrap the both sunction line and liquid line together using one single insulator?

The installation of a split-type air-conditioner wraps both sunction line and liquid line together using one single insulation, instead of wraping each line separately. Is there any significant loss ...
1
vote
2answers
413 views

Should my a/c have some sort of a drip pan (photo)

I've got water (condensation) dripping from this "radiator" in my a/c. It's slanted so MOST of the condensation drips along the radiator and into a drip pan. I'm wondering if I just need to clean it ...
1
vote
2answers
86 views

How exactly do heat pumps work in a cold climate?

I don't really get how heat pumps work in a cold climate. In New England where I live, most energy is spent heating the house in the winter. During the winter the outside is ALWAYS colder than the ...
0
votes
1answer
96 views

Ductless Mini Split heat pump not cooling / heating outside of room

I have a wall mounted mini split (Fujitsu 9,000 BTU) installed in my bedroom over my bed, intended to heat and cool my upstairs (there has no suitable location in the hallway). It is a standard sized ...
0
votes
1answer
63 views

Split System Air Con icing up at night only..?

My Mitsubishi Split System works great all summer but now I find that it heats wonderfully all day but then ices up outside during the night when the temp falls below 0. At -2 it stops altogether and ...
0
votes
0answers
28 views

30 y.o. air pump troubleshooting. Where do I start?

500 sq.ft. apartment, 2nd floor, 32 y.o. through the wall, ducted air heat pump. The pump is installed in a closet next to the apartment (separate entry), and the air ducts spread from there along the ...
0
votes
0answers
60 views

Is it possible to wire an electric radiant floor as a heat pump in my Nest thermostat?

I have a standard gas furnace, but recently installed an electric radiant floor in one room. I have a transformer at the electric floor and a regular low voltage thermostat wire to my Nest thermostat. ...
0
votes
0answers
30 views

Heat pump (AC Heater) start cooling once programmed temp is reached?

My AMANA (and another McQuay unit) in wall AC/heat pump unit works fine on cold days. However, I noticed when the room temperature is higher than the programmed temperature the heater starts letting ...
0
votes
2answers
153 views

Do I need a new thermostat?

This is my first winter in this home, just moved in this past July. So I get my electric bill and it's been running more than usual every since I moved in here. It wasn't too much more so I just paid ...
1
vote
0answers
43 views

Studio HVAC Solution

I have an interesting situation where I am in a studio that is approximately 300 sq. ft., and should require ~9,000 BTU/h (3/4 ton) heating/cooling capacity. There are three rooms--A bedroom (~11x8), ...
1
vote
1answer
394 views

Heat pump only running above 35 degrees

We have just moved into a house with a Lennox XP17 heat pump. It has two stages of electric heat strips in addition to the heat pump. In observing the power bill, I have been astonished at the ...
1
vote
1answer
1k views

Heat Pump Min Outdoor Temp for Goodman GSH130361AD

I just purchased an Ecobee3 and I'd like to minimize the aux heat usage by setting the "Minimum Outdoor Temperature" setting to the lowest possible value. Ecobee support says that anything below 35 ...
0
votes
1answer
40 views

single-stage or multi-stage Heatpump

I wanted to buy a super efficient multi-stage or atleast 2 stage heat pump and got three quotes but then another contractor came in and refused to quote or install that, saying upstairs master would ...
0
votes
1answer
79 views

Trane humidifier control switch replacement

The control switch that came with bypass humidifier installed with my Trane heat pump started acting up - only turns humidifier water on when I turn the dial all the way to max. I'm thinking I need to ...
1
vote
1answer
1k views

Heat pump minimum compressor temprature

I recently moved into a new house that has a heat pump (air-to-air) combined with a natural gas fired furnace. My old thermostat failed, so I replaced it with a new EcoBee thermostat. During the ...
1
vote
2answers
171 views

What steps are involved when replacing control board on Carrier unit?

Do I simply just kill the power and replace the control board? Is there anything else that I need to do?
1
vote
0answers
35 views

ECM motor in air handler not reaching full speed

I replaced the motor back in this thread at the height of the summer heat: old question The old motor was fine as I opened it up and a bug got fried inside and caused a short. I ended up with a ...
0
votes
2answers
174 views

Can I use a pressure gauge to detect refrigerant leaks in a heat pump?

Update: I should have stated that the plan was to repair the leak and continuously monitor the pressure to detect any future leaks. A recent decision was made to replace the heatpump. Installer ...
0
votes
1answer
77 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 ...
1
vote
0answers
32 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
votes
0answers
1k 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 ...
3
votes
1answer
3k 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
votes
3answers
1k 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 ...
3
votes
1answer
77 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
769 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
1k 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
177 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 ...
1
vote
2answers
312 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
142 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
votes
1answer
293 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 just ...
2
votes
1answer
46 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 ...