Question about Goodman GMS90703BXA Heater

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Condencing unit air is cold and then after 20 minutes comes out hot

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Hmm i cleaned the a coil and everthing worked fine

Posted on Aug 12, 2008

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Check filters to see if dirty, clean or replace. Is the coil or condensing unit iceing up? If so, have your system recharged and checked for leaks.

Posted on Jul 25, 2008

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How do I get my heater to blow hot air?


I assume this is gas . induced draft blower or ignitor.

Apr 30, 2014 | Goodman GMS90703BXA Heater

Tip

How Heat Pumps Work


How on earth can you get hot air or hot water from very cold outside air? How does a heat pump make this heat out of cold air?
When certain gases change their state from a liquid to a gas or from a gas to a liquid the magic happens.

A heat pump can do some pretty amazing things, when it comes to making heat. To understand the way they work, you must first understand what happens when certain gases change from a liquid state to a gas and back to a liquid again. To simplify it a bit we need to look at a basic air conditioning system. The refrigerant in an air conditioning system is changing to a liquid in the outdoor condenser. The compressor compresses the gas forming a hot gas. As this gas cools under high pressure it changes into a liquid form.

Inside the indoor coil the liquid is pushed through a small hole or orifice. When it comes out the other side it rapidly changes it’s state to a gas as the pressure suddenly drops. The rapid pressure drop changes the refrigerant to a very cold gas. Air flowing over the cold gas inside the pipes makes the air cool and provides air conditioning.


Now for a heat pump the process is much the same, only coils are just switched by used a reversing valve in the outdoor condenser unit. Instead of the heat being purged to the outside from the condenser unit, the indoor unit then becomes the condenser coil. The outdoor coil becomes the cold coil and cools the outside. This is why if it is very cold outside the unit will have to run in air conditioning mode for a short time to defrost the outside cold coil. When this happens the system will usually have electric heat inside to run and keep the indoor air warm.

The reality is that a heat pump is really no more than an air conditioner running in reverse. Through the magic of using refrigerants, a heat pump can then run many times more efficiently than straight electric heat. A careful heat loss/gain should always be performed by a qualified service person before any sizing of a unit. Too large or too small of a heat pump system can make it inefficient and possibly cause it to be very uncomfortable. The longevity of the unit can also be affected by sizing and installation. Be patient and look carefully for the best contractor to install your system.

A properly designed and installed heat pump system can give you many years of comfort and efficiency. If you look for and find the contractor that can do the job right you will get many trouble free comfortable years from your heat pump unit.

on Dec 29, 2009 | Heaters

1 Answer

The pole buiding 24 in hanging Dayton sometimes the blower comes on like after 5 minutes after everything else kicks in and sometimes like when its supposed to and sometimes not at all?? All the electric...


I'm not sure whether this is a gas unit or not. With many gas heaters, the blower comes on when the heat exchanger gets hot enough and goes off once the heat exchanger cools. Other things are happening before the blower goes on. The blower is normally controlled by a "fan control thermostat". This stat actuates the blower when the furnace is hot enough so that cold air is not being blown around and allows the blower to run until the furnace cools enough to get out the remaining heat after the flame shuts off but not so long to again allow cool air to blow around. If this fan control is malfunctioning, you will get erratic runs from the blower or the blower may not run at all or run long or continuously. The fan control is the first thing to check.
Gary

Jan 31, 2011 | Dayton Gas Furnace Heater

1 Answer

I AM TRYING TO GET THE AIR CONDITIONER TO WORK BUT THE TEMPETURE KEEPS GOING UP WHAT DO I DO


is hot air blowing out of discharge usually top of unit is large line suction cold if so compressor is probablly running. should be sweating on a hot humid day if not may need charged is cold air blowing out of registers if running too long may ice up and restrict airflow is filter clean important. if compressor is not running it could be several reasons too many to get into detail may have to call remember a old or out of adjustment unit will cost alot ie electric bill good luck hope this helps

Jul 08, 2010 | Honeywell Electronic Programmable...

2 Answers

Error code 62 on Brivis Me20 ducted heater


Hi
Error 62 is related to hot surface ignitor (HSI)or/nglo module

you can check the resistance of the ignitor should be less than 10 oms @ 20 degrees

failing that, if you incomming suppy exceeds 270 volt will also result in error 62

May 04, 2010 | Heaters

1 Answer

When on AC the air blows hot, when on heat the air blows room temprature


This is a wiring issue or you have a heat pump and the reversing valve is stuck.

Jun 03, 2009 | Honeywell Electronic Programmable...

1 Answer

Rinnai 1004F Heating the Outdoors!


Do you have the Economy button on? If so, and you have a large space to heat or the outside temp is very cold the unit may not be able to keep up. If this is the case the stove runs forever, trying to reduce the temp by 2 degrees every 30 minutes. This may not work for your space and outside temp.

Your ideas about the intake and exhaust are not quit right. There is a fan that pulls air from outside over the outside of the exhaust pipe (to preheat it). This fan actually pushed the combustion gasses all the way out the exhaust. The exhaust exiting should be a little hot. In very cold temps, frost can build up around the air intake, which is right around the exhaust pipe. If you see this you will need to keep it clean. It is a good idea to look at the exhaust everyday when it really cold.

Good luck,

Tom Hawkins
Bethel, Alaska
hawkins111@gci.net

Jan 10, 2009 | Rinnai RHFE-1004FA 38,400 BTU Energy Saver...

1 Answer

Heater shuts off as soon as the room is warm


I take it once the temp is set to 71, and the ambient temp reaches 68 or so, it shuts off, never to come on again?

If that is true the thermostat in the unit is damaged, worn out or in need or replacement, but try a couple tricks.

First, if there are access panels to clean, clean it per the manual, it could be that a dirty filter or air inlet is confusing the thermostat.

Next, unplug the unit for at least 5 minutes, try it again.

Next set the unit on it's highest temp and blower setting, let it rip for 20 minutes, shut it down, unplug and remain unplugged for 5 minutes.

Next set the unit at 71 HIGH MODE.

see if we have a mode switch problem or thermostat if it works on high mode, it is not the thermostat, but I imagine it is, but I am curious as to if it once goes off, it never again comes back on?

Will

Dec 01, 2008 | Bionaire BCH-4138 Ceramic Compact Heater

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