AUX Heat kicks working Intermittently or not at all.
ARUF182416 set up with Heat Pump. The unit won't call for heat strips even when the thermostat calls for aux heat. If I open it up and test everything everything checks out fine, when I put the meter to the sequencer then set the thermostat to call for aux heat AND THEN flip the breakers on, everything powers up and the heat strips are engaged and I get 24volts on the cal to the sequencer and 240 on the strip side of the sequencer. When I put it all back together it will work intermittently and sometimes a power cycle will get it to kick on when it doesn't want to play nice. I'm thinking the control board needs replaced but was hoping to get a professional opinion. . .
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If it is a heat pump if the ambient I door temp is not than 3 degree s lower than 66 it utilizes the aux heat ( heat strips) to help the unit achieve your desired temperature set point faster. Also the heat pump does need help if trying to overcome really cold temperatures. Once set point is achieved the heat pump should be able to keep the home at the set point without aux heat. But the flashing may just be to let you know that the heat strips are in use at the current time. See if when the temperature gets close to your set temp if it goes away. If not a heat pump it may always flash to just tell you heat strips are in use. Some homes mostly trailers only have heat strips but on heat pumps heat strips are there to help heat pump get to your desired temp. But when your heat pump can maintain the temp without the strips is where it saves power. Also heat pump thermostat hVe emergency heat settings. This scares alot of people but if your heat pump isn't working and you have to switch it to emergency heat until you can get it fixed,. That means that the system is only using heat strips and not utilizing heat pump at all. Power bill may be a little higher but remember, most trailer homes only have heat strips and if you do not use emergency heat in this situation your heat strips will only heat home 3 degrees below set point on thermostat to allow heat pump to bring it up the other 3 degrees. If heat pump isn't working correctly you will always be 3 degrees colder than what you set you thermostat at. Maybe too much info but it's prolly just your aux heat on helping system achieve the desired temp you set thermostat too.
Heat pumps defrost which is the AC mode, if the heat strip isnt working during a defrost, the air will be cold, A heat pump only feels warm if the heat strips are on too! the refrigeration cycles heat output is much less sensible to our 98F skin. heat pumps that satisfy a room setpoint are working at least, all heat pumps feel drafty to most.
If your thermostat has an emergency heat setting this means you have a heat pump system.
Yes you need to set the thermostat to heat for heating the house.
The emergency heat setting should never be used unless your outside unit is not functioning.
The emergency heat setting overides the heat pump (the outside unit will not be energized).
The emergency heat setting will run the auxillary heat (heat strips) only.
When the thermostat is set in the heat position the heat pump will run to heat your house.
If the heat pump can't keep up (extreme cold) then then the auxillary heat will kick in to augment the heat pump until it satisfies the thermostat settings. If your room temperature gets 2 degrees below your thermostat setpoint, your auxillary heat will kick on. Example, say you are going to be gone a couple of days and you turn your heat down to 60 degrees. When you return and it is 60 degrees in your house, you turn the thermostat up to 70 degrees. Since you are turning the temperature up 2 degrees or more (10 degrees in this case) from the 60 degree room temperature then the heat pump will come on and the auxillary heat strips. The unit will continue heating like this until the temperature in the house gets to 69 degrees and the heat strips will turn off and the heat pump will continue to run until the 70 degree setpoint is reached.
Hope this helps.
Auxiliary Heat is used to turn the electric heat strips ON, If the heat pump is not working. Or if the heat pump can't bring the space temperature up to Set Temperature it will display Aux Heat ON....... Assuming you have a Heat Pump System with Auxiliary Electric Heat as Back up...... If the tech didn't install a jumper wire from AUX to W on the subase which is in back of the Display on the Thermostat.....you won't get Auxiliary Heat if the Thermostat is set for Auxiliary Heat. Other wise the thermostat will turn the heat pump on first and then the electric heat (Aux Heat) if it needs it to satisfy the set temperature....... Hope this helps
I believe the unit you are describing is a heat pump. Heat pump are great when the temperature isn't below 30 With low ambient temps. outside it is much more efficient and comfortable to run aux. electric heat from the heat pump.