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Heating side, fan works, but the heating coils don't get hot ???

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Does the compressor run?

Posted on Feb 04, 2009

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Is the heat pump cooling itself down? It is a combination heat pump/air conditioner wall unit.

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

Dec 31, 2015 | Heating & Cooling

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Fan running but not heating

Hi Raja,
A couple of things to look for - make sure the compressor is working - if so the reversing valve coil may have failed
Check the two fittings on the outdoor unit - one should be hot while the other should be cool to touch - on heating the large one should be hotter than the small one
Does it work OK on cool?
Good luck

Dec 27, 2015 | Heating & Cooling

1 Answer

Want to know why one fan turns on all the time but the other two don't. Is this normal. The heating is working fine besides this. Tax

That's a condenser fan motors they work when you a/c system is running. On hot weather temperature they should work all the motors to keep the system cool.On the winter time they never works cause the weather outside is too cold.

Feb 03, 2013 | Heating & Cooling

1 Answer

I have a danby 8000 btu air condition. Model number DAC8008EE and its isnt cooling enough and gets hot. Can it go in a sleeve vent in my apartment? and why isn't it cold enough?

For some reason it is over heating. If the rear fan cannot vent the hot air out of the back of the unit properly, it will over heat. Make sure the rear coil is not stopped up with dirt on the inside of the coil. You will have to take the cover off or take a flash light and look thru the side vent thru the back fan blade at the inside of the coil. If it is stopped up with dirt, etc. You can wash this out with a water hose and sprayer, but make sure you don't get the motor and other electrical components wet. Best way is to take it out of the window, set it outside, and give it a good wash job. Let it dry out for a couple of hours before re-installing.
As for a sleeve, you HAVE to make sure the unit can vent out the back properly. If it can't it WILL overheat.

May 13, 2011 | Danby Heating & Cooling

1 Answer

Is the heating coil on my furnace supposed to come on before the fan or visa-versa?

Heating coil comes on first. When heat gets to a specific level, fan comes on. Fan stays on after coil is de-energized until heat drops back to that same specific temperature.


Feb 20, 2011 | Intertherm Heating & Cooling

2 Answers

I am trying to wire this unit to a honeywell t stat model T87N1026

Wiring a new sub-panel to an isolation transformer is one method of wiring for balanced power. With a balanced power system, the power sent to each "hot" bus of the power panel is 50 percent per bus. This means that the total power of the system is split evenly between each side of the panel. Balanced power systems have the advantage of reduced noise generation. This characteristic makes this type of system great for audio.
1.Shut off the power feeding the isolation mains transformer at the main power panel. Use the documentation supplied with the isolation transformer to locate the center-tap wire on the secondary side of the transformer. Connect that wire to the sub-panel's ground bus bar.
2.Route the remaining two wires from the secondary side of the isolation transformer into the sub-panel. Loosen the two "hot" wire main bus screws in the top center section of the sub-panel. Strip 1/2-inch of insulation off of the two wires.
3.Insert each wire separately into each of the wire screw terminals.Tighten the screws to hold the wire in place. Do not over-tighten these screws. If there is a neutral wire, connect it to the neutral common bar. Once these screws are tight, close the sub-panel.8_8_2012_9_21_38_am.jpg

Jan 18, 2011 | Heating & Cooling

1 Answer

Heating stops working all of a sudden

what kind of heater is this a household unit or a window unit... could be numerous problems if the heat starts to work is the fan continuing to run? also may want to check for obstructions such as a dirty coil which would make the unit get to hot and a limit is shutting unit off... what kind of unit and brand? i work on heating /air and all major appliances for over 17 years let me know

Dec 31, 2010 | Heating & Cooling

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The ptac unit is not heating or cooling the aux heat works the line out of the compressor gets hot but the line going to the coils up front does not get real hot just warm and does the same thing on the...

Verify all your components are operating - Compressor? Condenser fan motor? Blower fan motor?
If not check voltage to any that are not operating.
If all components are operating and the coils are clean - the refrigerant level is most likely low.

Oct 28, 2010 | Amana PTH153B50AJ Heat Pump Air...

1 Answer

Samsung CH44CA 407c. working on cooling but when on heating the fan not working on heating

usually the fan starts after when indoor coil has heated up but it doesn't indoor coil thermistor or pcb is defective.

Oct 14, 2009 | Heating & Cooling

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