I have a intertherm heatpump that has the heat strips located in the outside unit. The heat pump works ok until the temp gets around freezing then not enough heat to hold the thermostat setting. I suspect the strips should be helping the heat pump but is not. I can manually turn on the emergency heat and get hot air. also there is a cycle when the heat pump blows ice cold air for about 2 minutes while in the heat mode. Hope yoy have some advice. Thanks
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Re: intertherm heat pump
FIRST YOUR OUTSIDE UNIT PROVIDES HEAT BY USING A REVERSING VALVE TO CHANGE THE REFRIGERANT FLOW.THERE IS NO HEAT STRIPS OUTSIDE SECOND YOUR EMERGENCY HEAT TURNS ON ELECTRIC ELEMENTS INSIDE YOUR AIRHANDLER UNIT.IT SOUNDS LIKE SOMEONE HAS WIRED YOUR UNIT WRONG OR HAS THE THERMOSTAT SET IMPROPERLY.WHEN THE HEAT PUMP CANNOT SATTISFY THE SETPOINT THE THERMOSTAT IS SUPPOSED TO TURN ON YOUR ELEC. HEAT UNTILL THE LOAD HAS BEEN REACHED AND THE HEAT PUMP CAN CONTINUE TO MAINTAIN IT.
It sounds like you have a packaged unit for modular or manufactured housing. If this is the case I have noticed that they have a outdoor thermostat wired in series that does not allow the heat strips to come on unless it is satisfied at around 55 degrees. Remember this is inside the unit so it could be much colder outside. If this is not the case you may have a defrost problem, either in the defrost board or defrost sensor.
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some times heat pumps have a fan cycling switch to keep the head pressure normal in cool weather or check the defrost relay for the fan when a heat pump condenser gets frosted it will stop the fan and reverse into cooling mode for a few min. to melt the ice and this function is done by a relay or a printed circuit board if it goes bad you wont have voltage to the fan
Hi; I hope You called a company that will honor any warranty on the heatpump. Sounds to Me like I would contact the original installer for more help or free replacement.Also at 55 or 75 degrees outside The heatpump should be providing toasty air. Only at close to freezing temps will You get a reduction in warm air and then the heat strips will help out then also check to see if the unit has outside air dampers and make sure they are closed..alpharome416
If it is a heat pump, the compressor will be running both in cool mode and in normal heat mode.
Confirm the current indoor temperature. Turn the thermostat up one degree at a time until it comes on. This will typically be 1 to 4 degrees increase. As soon as it comes on stop increasing the temp.
If the compressor is running, it is a heat pump.
Check the temperature coming our of the vents at that time. You should have 30 to 60 degrees increase from the air temp going into the unit and the conditioned air temp coming out.
Then turn the T-stat up another 10 degrees. If the temp coming out of the vents increases by 20 degrees or more. the strips are on.
The strips operate in three situations.
1) the system is set to emergency heat
2) The heat pump cannot keep up with the demand for heat. (because its too cold outside, the desired temp setting is greater than 4 to 8 degrees above the room temp, or the HP is malfunctioning.)
3) The HP is in defrost mode
You could also take the panels off the unit and look for a reversing valve, but unless you know what you are looking for you will not recognise it.
ok...where to start.lol ....the thermostat is just a switch.It will tell the unit to run or not run.if you measure the temp with the heatpump running,the air is warmer than 68 but it feels cool to you because your body is 98.6.The unit will run more often and for longer periods when the temperature drops outside for a few reasons.First,your house has more of a load to heat,meaning you have more heat loss because of the difference in temperatures outside and inside.Second,your heat pump pulls heat from the outside air.The colder the air outside,the less btu's for it to pull.If you have anymore questions email@example.com Hope this helps,Dave
Your furnace will either have circuit breakers or fuses at the bottom in the panel below the blower. Also, there MAY be fuses in the disconnect box outside that gives power to the heatpump. Intertherm furnaces are famous for leaking water onto the left side of the electrical panel in the furnace which is also convieniently where the low voltage transformer is located. If you consider yourself electrically competent, check to see that you are getting 240v to your transformer and if you are the check to see if you are getting 24v out of the transformer. If you can't find the problem in any of these steps, I would recommend contacting a qualified professional to check the system out.
YOU HAVE ONE OF SEVERAL PROBLEMS , FIRST AND EASIEST TO REPAIR KEEP FILTERS CLEAN REPLACE EVERY 30 DAYS , #2 LOW CHARGE WILL CAUSE ICE ,# 3 A FAULTY INTERMITTENT FAN CONTROL SWITCH ,THIS WOULD BE MY # 1 GUESS SINCE I HAVE SEEN IT MANY TIME OVER THE YEARS , #3 WOULD BE A FAULTY DEFROST CONTROL BOARD OR SENSOR , THE REASON I LEAN TOWARD THE FAN CONTROL IS YOU SAY THE ICE IS ALSO IN THE INSIDE UNIT AND THIS IS MOST COMMON WITH RESTRICTED AIR FLOW OVER COILS AND SOME TIMES THE FAN SWITCH WILL CAUSE THIS PROBLEM THE DISCHARGE TEMPERATURE IS DIRECTLY RELATED TO THE TYPE OF UNIT ,TYPE OF REFRIGERANT IN SYSTEM AIR BALANCE CFM OF FLOW MANY VARIABLES IN THIS EQUATION,CANT SAY