I have a GMP075-03, was freezing up because it was low on freon. Turned unit off and called for service. After freon, unit does not freeze up, but we have a new problem that I noticed when it was freezing up as well. You turn on the air and about 5 minutes, sometimes 3, sometimes 10 after you turn on the air, (which works fine) the draft induction fan comes on (the fan that purges the system before the heat comes on.) This fan runs for about a minute and then you hear it shut off, and then start back up, and continues this cycle until I manually turn off furnace power downstairs. I put on a new thermostat today and that did no good. When it does this in air mode, the ignitor never comes on or anything like that, just the draft induction motor. Any help would be appreciated. My wife has a rare form of cancer and I'm just trying to save any money I can. I'm very mechanically inclined...there are just so many sensors I wouldn't know where to start guessing. Thank You In Advance!
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yes it can but also low freon can do the same turn stat all the way down and observe unit now turn all the way up if unit still doing the short cycle at either temp range stat is faulty if when stat was on high temp zone and unit turned off will need to check on the system for low freon but if your having problems with stat replace its cheap insurance against higher electric bills and possible damage to the a/c system
What are some of the best lines that unscrupulous techs and companies use to get you to buy a new furnace or air conditioning system from them. I will give you a heads up on some of the best lines that I have come across.
“Your heat exchanger is cracked.” This line will scare many people and unfortunately I have seen it used on the elderly often. These are some of the most vulnerable of society and how would they know if a supposedly knowledgeable individual told them that they could die because of their heating unit.
“You’re A/C or Heat pump unit needs to be topped off with Freon because it is low.” Heat pump or A/C units do not “use” refrigerant! If they are low then there IS a leak, make them find it so they cannot come back and charge you every year for more.
“Your Freon is bad and must be changed.” Hogwash!! Freon never goes bad if it is in a system that is sealed and tight. Moisture and contamination from a burnt compressor are the enemies of Freon.
“Your Compressor is failing and not pumping right.”Most compressors will last for many years. Ten to 20 years or more is not uncommon, unless you live in a well to do neighborhood…. It is funny how the lower income guys get the low Freon line and the higher income people get the compressor line.
“Replace your air filter every thirty days” If you are a normal person with normal air filters and one or two pets, then you will be just fine changing your air filter twice a year with heating only and 4 times a year with heating and A/C. The exception may be if you are using a very expensive ultra high efficiency air filter. If you want that kind of filtration then make sure you install one of the 4 or 5 inch deep filters that can handle a ton of dirt before they plug up.
“Your Thermostat is bad and that caused the problems you are having with your unit.” Yeah right….just another way to con you into spending more money!!! Make sure that you try the unit with the new parts and see how it operates before also changing the thermostat.
And the last one…”The company that installed your system has to be the one to work on your system.” If you are having trouble with your system, then why do you want the ones that screwed it up in the first place to continue the saga??There is no person with a corner on all the knowledge in the HVAC industry. It is very easy for someone else to work on a system that they did not install. Well, if it was installed even remotely as it should have been…. I have seen some systems that have had me scratching my head wondering what on earth the guy was doing!!!No wonder it did not work!
Bottom line… do not be to quick to believe everything that comes from a service technician. Many companies pay a commission to service techs for sales made from their referrals. What is wrong with that picture?I rest my case.
Sounds like the internal thermostat is stuck causing the unit to think that it is not cold.
If you would like to tackle it yourself it is usually a part of the Expansion valve, witch will require opening the system. I suggest a service professional as Freon is hazardous, and being wrong is expensive.
It could just be that the rheostat on he control knob is going bad BUT that wouldn't cause Ice to form on the Unit.
If its in the cooling mode the ice is in both places. It freezes up inside first then works its way outside just usually not easy to see the inside ice because its incased in the coil box. This could be due to a lack of airflow ie dirty filter coil or closed dampers or low on freon. If its a heat pump and in the heating mode it could be a bad defrost control, lack of airflow across the outdoor coil or low on freon.
Sounds like the t-stat is wired wrong or if you bought a honeywell from home depot didn't set up correctely. You could also have other issues, like low on freon, dirty filters. You might need to call a Service company to take a look at it.
On Monday, 1/21/08, I returned the Marvin 2060 heater to the store I purchased in 02/07 since the freeze guard stop working. The owner left me a voice message at home and said he after doing some research, he discovered Marvin went out of business in 12/07. And the heater is no longer covered under the warranty. The owner gave me a telephone number, 800.326.3690 which carry the parts for Marvin Heater. I have not called the number since I am looking for another heater with the freeze guard feature since it something I need quickly.