Hello, We have two heat pumps for dual heating and cooling. The upstairs one seems to have a problem. First of all, we have digital thermostats installed and when the heat comes on upstairs to heat to the temp setting, it runs for a while and does not reach the set temp, the emergency (auxiliary) heat kicks on to bring it to the correct temp. What could be wrong with the heat pump. Our downstairs unit is fine which has larger ceilings and a bigger space. Help??
Sounds to be a system freon leak. The unit and the stat talk to each other and if the temp is not reached and the unit shut down in a set amount of time it turns on the E-heat. Now there are other facts that could be involved, plugged filters, dirty coils inside and out, etc. Check your filters first to eliminate that problem.
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Are you talking about a pro 5000 Thermostat??? if so then NO it will not work.With this stat you do not have a temperature lock on the heat pump. Say you don't want the heat pump to run below 25 degrees. it won't shut the heat pump. And you don't want the heat pump to run at the same time as the furnace. With the Pro 8000 3 heat and 2 cool thermostat you can lock out the heat pump at 25 degrees outside an turn the furnace on. You will have to install an outdoor thermostat hooked up to the pro 8000 it usually comes with the stat. Honeywell products.
CHECK IF THE PUMP COUPLING IS THERE IF SO TRY BLEEDING THE RADIATORS UP STAIRS TO SEE IF U GET COLD OR HOT WATER N IF THE WATER IS DIRTY. THEY LINES MIGHT HAVE AIR IN THEM. IF U TRIED THESE N STILL NOT GETTING HOT U WILL NEED TO CHANGE THE MOTOR N COUPLING
Hi, first of all you need to get a hand full of 5 amp auto type fuses and install one on the hot leg of the 24 volt secondary side of the transformer. Just use 2 female crimp on connectors and put the fuse in the middle of the hot wire. Saves $$$$ on replacing transformers when you have a dead short on the low or high voltage side of any transformer, just a trick of the trade, food for thought. Fuses are much cheaper. On your electric unit, you may not need the common on this to operate the digital stat if it has batteries. This may be your dead short. On the Janitrol condenser, the red is your 24v as you no. They are using blue in place of yellow for cooling. Red is hot, W is heat, G for fan, and blue is cooling on this Janitrol. Keep in mind you are connecting to a heat-pump also, so make sure the wiring is correct. Are you installing this for secondary Heat?? More then likely, the blue common you have added is the dead short as the janitrol uses the blue for a cooling relay in place of yellow. Anyway, use the 5 amp fuse, trick of the trade to save on the transformers. Please keep me posted, as I know know you have this under control. Shastalaker7 A/C, Heating, & Refrigeration Contractor. Good Luck!
Most heat pumps have an auxillary heat. Many are electric auxillary heat with a heat strip in the air handler. A common malfunction is for the electric auxillary heat to operate when the heat pump is set on cool. To confirm this, locate the conductor that runs from the heat sequencer to the connection on the heat strip. You will see this on the top section of the air handler. Use the clamp on part of the amp meter over that wire. If the thermostat is set on cool and the heat strip is drawing amps, it means the heat is coming on while the heat pump is set on cool. There is usually one or two causes for this, either the sequencer is bad or there is low voltage wires usually behind the thermostat or in the air handler closet that are touching that shouldn't be touching.
If this is not the case, if its not a problem of where the heat is coming on with the air conditioner, it could be a case of the reversing valve malfunctioning. The way a heat pump works is it reverses the flow of the refridgerant. For instance, many heat pumps the reversing valve is activated in cool. That would mean that there is a low voltage circuit that activates the reversing valve when the heat pump is in cool. I'm not sure what model/brand your heat pump is, Goodman and Janitrol for instance, the heat pump reversing valve is activated in cool. In any case, if the reversing valve is not operating properly, when the air conditioning is set to cool it will actually be heating. Or you could set it to heat and it may actually be cooling instead of heating. Please check these two items first and if you have any further questions, please let me know. Especially if you know of any additional problems like the evaporater is icing up or if the air handler fan is not operating when it should.
i would get someone to check your refrigerant levels have you ever had the evaporator coil flushed and cleaned? proper refrigerant levels and proper airflow across coils are extremley important not to scare you but 18 yrs is a long time on a heat pump 9-12 years is the point where they really loose there efficiency going for a newer one would probably cut your operating cost in half if not more depending where you live there are a lot of people not familiar with heat pumps so i suggest finding a company that specializes in them to service your unit
is the condenser operating? what is the outdoor temperature? A heat pump is a cooling system with a reverse gear, most reversing valves which make this possible fail to the heat mode so it is not likely to be the problem. You should have either gas or electric back-up heat. If you switch to emergency heat do you get warm air? Really need to find out more to make an informed guess at your problem, the simple stupid would be is the circuit breaker to the condensing unit possibly tripped or shut off?
There should be electric heat strips in the airhandler.
They automatically come on when the unit goes into defrost, the thermostat is turned up more than 7 degrees over the indoor temp or if the outdoor temp is just so cold the HP cannot keep up.
Tat is your auxillary or emergency heat.
What does the new t-stats installers booklet say that the 0170 function and #2 #7 options are for?
If it is for gas vs elec heat then set it on the elec option.
The difference is that in gas heat systems the blower comes on a few min AFTER the furnace fires up to allow the heat exchanger to get hot.
In an electric furnace the blower has to come on emediatly because the heat strips get hot emediatly and if the blower is delayed the system will shut of in high temp overload.