I have a Sanyo through the wall heat pump unit. When I plug it in the heater coils start heating even with the dial in the off position. No matter where I turn the dial; heat,fan, or cool the heater coils stay on. The compressor seems to be working fine and the reverse switch seems to be working but with the electric heating coils on all the time of course all I get is heat. This is also very dangerous because as I said the coils stay on even with the fan off causing the unit to overheat and start smoking. Any help is sincerely appreciated.
We use the STW0925H! in 60 rooms on this property and have encountered similar problems that were caused by weldedd contacts on one of two relays that controls the electric strip heat. They can be replaced if needed.
PTHP's and PTACs employ thermal fuses as well as a bimetal limit stat on the heating element to limit risk if fan motor were to fail and the heating element were to remain energized. It would be wise to check that both are fuctioning properly while you are servicing the unit.
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Some models don't use the compressor as a heat pump for heating. And only use electrical heating coils in the heat cycle.If yours is one of those. It may be a burned connection at the thermostat or at the heater coil. Heater coils may have a safety diode or fusible link that opens if the heater coil is on but there is not enough airflow. If that is the problem you will need to remove the bad heater coil and replace it. If your unit is a "true" heat pump the change over valve could be stuck or it's coil burned out. If you know what it looks like you can measure the voltage at the coil. If you have voltage sometimes you can whack the valve with a screwdriver handle to "unstick" the valve.
if it's electric the heater could be shorted.one of the coils could be touching metal shorting it out,pull the heater out and check the coils for a break in them,next time send the brand name and model number.
If you are having problems with your gas dryer not heatingthe most common problem is that the ignitor goes bad. Even though it glowssometimes it is still not working properly.
if you dryer is gas check out this gas no heat tip....
If you have an electric dryer, you can have many differentthings that can go wrong causing the dryer not to heat.
check outthis electric no heat tip...
gas or electric ok gas replace gas coils check glow bar ignighter,check thermostates,,,,,,electric check power to both sides of wall outlet you need 220 volts and it will start and timer will advance on 110 vts second check second fuse looks like a thermostate normally located at top of heater coil call if you need to http://www.washerwizzards.com
sounds as if the heater coil itself is burnt out. These coils may be repaired if you can get an universial coil repair kit and rewire the heater coil yourself. Since the age of the unit is in question I don't know if it is possible to get a kit for repairs but you never know. I would check an a/c supply house for this kit. Good Luck on your repairs
when the coils freeze up , from intake of outside air, when using the heat pump mode, the unit will try to defrost the coils before going back to heat mode. mine did this alot. does it kick back to heat after a few mins? also after 2 years , mine started having issues with the exhaust blower control and would go into warp mode and bang noise.seems like common issues for this unit.whether the amana, or haier version.
Make sure that the heater is mounted where convection currents occur freely. When heat builds up around the top of the heater its temperature will rise uncontrollably. You'll be luck not to get a fire.