Lights but does not heat

If a unit is in heating mode the outdoor unit is in cooling mode (outside always does opposite of indoor) after a while if there is a build up of ice on outdoor coil unit stops and puts hot gas through outdoor coil to clear it. The indoor fan stops to avoid and heat loss in area served buy unit once this has been done and indoor unit coil is hot again fan will start. This is the correct operation of the unit to save against bust could and reduced efficiency

Should like your unit is working fine unless this is constantly happening. If this is a constant thing then condenser coil if dirty,check thermostat setting

The heating element has a thermal fuse in it which most likely has opened causing the element to not heat.

I'm seeing a master switch on the control board, try a reset there. But, sounds like a bad element. You need to test continuity through your heater components. When testing a component unhook wires first, as they will still have continuity even if bad with wires attached.

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The unit is probably to small for theare you are trying to heat.

When the Aux HT light came on that meant the heat pump could not keep up with the demand for heat. (Probably due to extreme cold, or undersized unit.)

If yu have heat, then at least one heat strip is operating. If you have multiple heatstrips, one or more could be malfuncioning.

Or it could simpy be to cold/to small fr your area and not able to keep up.

How many square foot are you trying to heat?
What is the outside temp?
What is the inside temp?
What size unit (BTU output) do you have?

I work for Black and Decker customer support. Our customer service phone number is 1-800-231-9786.

If the unit isn't heating, it needs to be replaced. Unfortunately, the unit can't be repaired. The unit comes with a one year warranty from the date of purchase. Please call the number above so that we can determine your warranty eligibility and help you in any way that we can.

While this doesn't actually solve your problem, I hope the information allows you to make an informed decision as to how to proceed from here. Please let me know if I can be of further assistance.

WHAT WAS HAPPENING AT 1ST YOUR HI-LIMIT TERMAL SAFETY OR OVEN TEMP SENSOR FELT THAT THE OVEN WAS GET TOO HOT AND SEIZING OPERATION UNTIL SAFE TEMP WERE OBTAINED THIS IS GENERALLY A FAULTY OVEN TEMP SENSOR. I WOULD ADVISE YOU TO CONTACT A CERTIFIED TECH TO LOOK AT IT AND P.S. DON'T MENTION THAT YOU TOOK THE MACHINE APART MOST SERVICE COMPANIES WILL NOT SERVICE THE MACHINE IF IT BEEN TAMPER WITH BY THE CUSTOMER DUE TO INSURANCE AND LIABILITIES

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There was a problem with the heating cycle , the seven flashes indicates the temp never reached the setting. You can try running a service cycle that will reset the control, then try running a normal cycle if it stops agin will have to find the part causing the trouble believe they actually came out with a revised heating element on this. to run service cycle press heated dry , normal, heated dry, normal within six sec then the d/w should step through a service cycle.

Yes this is a heater fault detection error. The unit may not be heating the water resulting in unsanitary dishes so the unit shuts down in this fault. Also the door may not have completely shut resulting in the heater not working, but everything else does (the heater common line is broken at the door switch. Clear the fault by entering diagnostics with this key dance heated dry, normal, heated dry, normal. All the leds will light, you can then press cancel and try another wash cycle. If fault occurs again, you must repair heater problem.