Questions tagged [heat-pump]

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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1answer
57 views

How can I deal with a heat pump condenser producing lots of water?

Heat pumps was replaced in 2017. North Florida has had moderately cool weather (50-60 degrees F) recently. I noticed water underneath one of the units. Is the water pooling normal? If yes, why? If ...
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1answer
23 views

Heat pump blower motor cycles on/off after running 140 seconds

Standard Trane split heat pump, condenser outside blower inside. Usually the system will run normally but after 2 min 20 seconds the blower motor will cycle on and off randomly for 20 seconds. Then ...
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4answers
338 views

Best Way to Heat a Ductless Multi-Level Home

I just bought a home and it desperately needs an update to its heating. It currently has baseboard electric resistance heaters in every room. There is no duct-work in the house. We're in cold humid ...
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1answer
159 views

Why is my Heat Pump fan not turning in cold weather?

My heat comes on and you can hear the condenser unit come on as well. However the fan is not turning? The outside temp is 30 degrees? Is this normal? Can anyone share some wisdom on this? Thank ...
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37 views

Heat pump can't get a zone to 72° F

I have a heating system with both a heat pump and a boiler. The rule for the system is that if the temperature in a zone is 5° F less than called for, then the boiler will come on, but otherwise the ...
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56 views

Dual energy controller 2AC02700701 runs heat pump with low fan only

I am running a central heat system that uses a heat pump as stage 1 and a gas furnace as stage 2. The thermostat is not directly connected to the furnace and heat pump motor, instead to goes through a ...
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2answers
114 views

Thermostat White-Rodgers 1F82-261 switches to stage 2 heat for no apparent reason

I am running a central heat system that uses a heat pump as stage 1 and a gas furnace as stage 2. The thermostat used is the White-Rodgers 1F82-261 which supports 2 stages of heat. When using regular ...
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1answer
148 views

Carrier infinity 25vna heat pump utility curtailment

I have a newly installed infinity greenspeed hp system and the utility is trying to figure out how to control the outdoor unit in heating mode. It's my understanding that the utility sends a signal ...
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1answer
60 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 ...
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1answer
743 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 ...
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1answer
168 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 ...
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1answer
217 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 ...
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1answer
78 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 ...
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668 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 ...
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1answer
255 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 ...
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1answer
74 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 ...
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1answer
7k 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 ...
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1answer
66 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 ...
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3answers
1k 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 ...
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4answers
189 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 ...
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1answer
84 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?
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4answers
115 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. ...
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1answer
1k 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 ...
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1answer
170 views

Bosch Heat Pump + Hydronic Coil?

I was hoping to get some advice on the proper setup for this system. I live in Long Island, NY and just moved into a large house with an extremely old oil burner and 3 a/c condensers. I'm about to ...
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1answer
77 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 ...
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1answer
93 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 ...
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2answers
2k 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 ...
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2answers
113 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 ...
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1answer
359 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 ...
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1answer
72 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 ...
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32 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 ...
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1answer
141 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. ...
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32 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 ...
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3answers
278 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 ...
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52 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), ...
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1answer
983 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 ...
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1answer
2k 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 ...
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1answer
53 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 ...
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1answer
126 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 ...
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1answer
2k 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 ...
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2answers
552 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?
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54 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 ...
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2answers
288 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 ...
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4answers
466 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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0answers
2k 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
10k 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 ...
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3answers
2k 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 ...
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1answer
124 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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2k 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
2k 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 # ...