JC asked:

I just bought a house and was replacing an old mercury stat with a new non-programmable digital one. My father in law started in on putting it in before I even knew he was starting, and he failed to label every wire. His reasoning is they were already color coded on the old one letter for letter anyways.

Well, that is one prob, but I think I have worked out the correct color coding for the wires anyways, as we had a blue wire and a tan wire with black tape on it ( I assume prev installer wanted the wire to be black?) The rest were pretty basic (Red, Yellow, White, Orange, Green, Blue and the tan/black)

Well, he failed to cut off the power before installing. I cut the breakers about mid installation, but my new theory is he may have crossed wires and blown a fuse on the pump.

I have a Gibson split system heat pump. My goal today is to open it up and find the fuse and replace it. The current setup will not power anything on, including the fan. Is there more tests for power?
I have taken apart outside unit and the inside unit, no dice. No fuse, at least that I can recognize, is anywhere. Going to just call a tech tomorrow and pay a ridic fee for one to change a fuse
Problem Solved. The reason I couldn’t find a fuse, was there wasn’t one. Transformer was blown, Tech came in and replaced it, all is working.

Thanks for the answers, after 3 days of racking my brain, just glad the issue is resolved

Question posted courtesy of: Nicole

yoyo asked:

I live in Quebec, Canada. Now, I want to build a house. Everything goes well except the heating/cooling system. Heat pump, actually, should be a good choice because it can save money; however, I still have two questions about that. First, heat pump contains a compressor, a condenser, and an evaporator. Do they make any noise when they are working? Second, if the temperature is below 32F, does the heat pump still work? Because I live in Quebec, the winter is so long and cold, maybe from November to next April, usually below 32F, and sometime around -7F. So, can heat pump stand this kind of weather, and work well?

I appreciate your responses, thank you guys:))
The builder provides two systems: heat pump$6500, air condtion$4500. which one is better?
The builder provides the heat pump model which is “Heat Pump 3 tonnes Rudd”. What does it mean? Can it work well in Quebec winter?

Question posted courtesy of: Raymond

dzilla169 asked:

A heat pump delivers 28.0 kW to heat a house. The outside temperature is -6.0°C and the inside temperature of the hot-air supply for the heating fan is 42.0°C. What is the coefficient of performance of a Carnot heat pump operating between these temperatures? Note that a heat pump is like a refrigerator with the output of the hot reservoir serving as the source of heat.

Also what formula did you use? I have been doing
COP=Qh/W but I know I am messing up somewhere.

Question posted courtesy of: Douglas

DV SYSTEMS asked:

water loop underfloor concrete embedded and going through a 100 gallon tank for reserve and then through evaporator heat exchanger , return from the tank which is in the floor heating loop has a temperature of 74 degree Ferhenheit and enters a heat exchanger at evaporator level from there the heat pump picks up heat and transfers it to the refrigerant and compreses the refrigerant which turn to high pressure , high temperature ( 140 degree F ) and pushes the hot pressured refrigerant to the condensor loop which high heat transfers to the output heat exchanger and the refrigerant passes through the expansion valve and back again to the evaporator loop to complete a cycle and rady to repeat the cycle until satisfied by a thermostat … the picked up heat from the condensor heat exchanger being transfered now to the water loop recirculate trough a circ. pump and to the floor heating loop and the 100 gallons tank and back to the evaporator heat exchanger again … 74 F to 90 F = energy ?

Question posted courtesy of: Laurie

roxygo1980 asked:

I had a heat pump installed last summer, and in the summer as an air conditioner it worked great. However, since the weather got cold, it never seems to be coming on. The unit itself I mean. It doesn’t make any noise or give any indication that it’s running.. I know it’s still “working” because it defrosts itself… but when i have “heat” on, the heat pump is definitely NOT.. I heard that there’s a certain temp that the heat pump does not work below, but then i heard that that wasn’t true, that instead there’s a certain temp that the heat pump works WITH the emheat, so it’s not as though it turns off when it gets too cold.. Any ideas?
emheat = emergency heat which would be my backup electric furnace. The thermostat says that the heatpump is running (and not the furnace), however, the heat pump is not, so by default the furnace must be, because the house DOES heat up..
i called my mom and she told me to reset the furnace, which I did, and now the heatpump is working, but I have no idea why..

Question posted courtesy of: Lewis

Bobby S asked:

I have a new york heat pump. the other night the coils are so frosted up that the heat pump is blowing cold air i keep it running for 40min and it is working Every time i get a heat pump this happens. What should i do?

Bobby S.

Question posted courtesy of: Sara