Why does my PTHP. shut off and switch to electric resistance heat?

Hydronic switch open 9 E9 Hydronic switch open (if hydronic configured) - either the aquastat is defective, or the aquastat wiring is cut, or the aquastat is not present at all and the aquastat wires were not permanently connected together as per the set-up instructions.

diagnostic codes for ptac/pthp electronic control

https://www.google.com/search?q=Amana+PTAC+error+code+09

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Heat pumps don't work when the temperature is at 20F. They run the best at about 40-50F. At 20F, the compressor doesn't come on and it switches to electric resistance heating. So you pay full price for your heat when it is that cold. The hum you hear is caused by the temperature sensor deciding whether to run the compressor or run the resistance heat. Twenty F is pretty much the cut off point where the heat pump loses it's fabled 300% efficiency (which actually happens at around 50F) At 20F the heat pump is very close to 100% efficient , so it makes no sense to get the wear and tear on the mechanics of the unit, so it switches to resistance heat which is also at 100% efficiency with no moving parts.

This timer is rated for incandescent light bulb only.
With 40 watt minimum.
With 100' maximum distance between bulb and timer.
http://waterheatertimer.org/Intermatic-timers-and-manuals.html#ej351

EJ351 is not rated for CFL bulbs (or motors etc).
CFL bulbs are considered inductive loads (same as motors), while incandescent bulb is resistive load (same as a heating element).
Both types of loads use electricity differently.
Programmable wall timers are not ordinary on-off switch... unless you use the override switch.
... instead timers control electricity with electronic circuit board.
So when the manufacturer designs the electronics inside the timer, the design must anticipate how the electricity is used by the load.
Older designs like EJ351, and some modern timers, are not rated for CFL.
... however most newer timer designs are rated for both resistive and inductive loads.
Always read the specification sheet for load rating before installing programmable timer.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

while i'm here , give the fabric a flame test with a torch or lighter, just to make sure. some are more flame resistant than others. should be listed on the fabric roll label. good luck again! also, some appliance stores may sell do-it-yourself heat gasket materials.

If you have a Dimplex Fireplace Model # bf 8000st Mod C I can tell this. 1-Yes there is a EC (emergency cutoff) switch when this unit gets too hot. 2-There is a thermostat.These units are usually placed within a wall cavity. These cavities are closed and will build up heat very fast because - there is no vent for cool air intake. RESOLVE: Go to Home supply and buy one or two 2x12 inch register vents. Custom place this new vent(s) in the cavity wall where it may have excess to cooler air from the room.
I completed one vent yesterday and the fireplace runs continually now. I plan to add the second one for balance in the next couple of days. You will be as amazed as I was. IT WORKS NOW...

Probable trouble areas, in order of likelihood are:
1) Heating element has broken and needs replacement.
2) One of the thermostat/overheat switches has failed, needs replacement. (there are from 2 to 5, depending)
3) A wire inside the back or the bottom has burnt in two, needs repair. ( often near the heating element)
4) A wire has burned or broken in the back of the machine where you attach the electric cord from the wall/floor.
5) A circuit breaker has tripped for the heating part of the dryer. There are two wires from your "fuse box" to the dryer, one for the heating element, and one or the motor and controls.
I you should decide to fix it yourself, you will be needing tools and testing instruments, and a letter to "fixya" could cause someone to help you with the steps to do so.
Be blessed.

1.Check sensor connection. 2.Measure sensor resistance (1080 Ohms at 70 degrees F. Add 2 Ohms per degree F). 3.If resistance is not valid, replace sensor. 4.If sensor resistance and connections are good, then check for welded-closed relays on the control.

Here is the sensor to order if it is bad.

You might put in gas logs or an electric log :-P. You could consider a Ductless mini split too. These are quiet and efficient.

Hi and welcome to FixYa. I am Kelly

Open the door and grab one of the baffles. Check to see if there is major resistance when you try to rotate the drum. No major resistance = a broken drive belt

A broken drive belt will also trip the belt safety switch by the motor and will not allow the motor to start.

The drive belt is item 26 here:

http://www.appliancepartspros.com/partsearch/model.aspx?model_id=5161471

Please check the door switch for a click when you just open or close the door. Within about 1 inch of closed usually you will hear an audible click. You said the light works so I doubt the door switch is the problem... (it still can be the problem though) 1/2 of the switch is for light control the other half for drying control.

The other suspects can be
1. The start switch
2. Timer control
3. Motor control switch

ONE more thing to check is go to the main circuit breaker panel and physically push the dryer CB to OFF then back on. After doing this try to start the dryer. Sometimes ONE of the 2 CB's trips for unknown reasons.

Finally if the dryer vent system was restricted and the the dryer got very hot (309 Deg) the thermal fuse on the side of the internal rear duct housing will also shut off the dryer and it will not start.

Item 9 this link:

http://www.appliancepartspros.com/partsearch/model.aspx?model_id=5161471&diagram_id=907130#d907130


http://www.appliancepartspros.com/part_details.aspx?part_id=3094244

Before you return the dryer to service... vacuum everything including all ducting internal and external to the dryer. Do not forget the thru the wall vent flapper where it exits the outside wall.

Thanks for using FixYa

Kelly

What is your model number, maybe we can help.

Greg