Tip & How-To about Heating & Cooling

Air Filters for you Furnace/AC

It is always a good idea to purchase the less expensive filters for your Furnace and change them often, the expensive pleated filters often restrict too much airflow and can actually shorten the life of your equipment..

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Gas furnace short cycles 2 minutes or less. Multiple troubleshoot steps and replaced components - no help. Any advice?

I did not see that your indoor fan motor started. Near your indoor fan motor there is a temperature switch that is called the fan delay relay. On a temperature rise the relay shuts a contact that turns on the indoor fan motor. If the contact does not close the high temperature limit will shut the gas controls off like your getting. A fan delay relay also allows the fan to run a minute or so to carry away the remaining heat in the furnace and help cool the furnace down. The fan delay relay is normally mounted in a recessed area in the fire wall of the furnace plate. I have also seen them on the top of the furnace heat exchanger. Anyway, the fan delay relay will probably not be available on a sunday, so temporarily until parts are available, try turning the thermostat fan from auto to on and try the furnace again. By turning on the fan to on the high temp limit will not shut you down again.

I have had high temp limit change there trip points, but you said you bypassed it and did the same thing.

Another cause could be using the wrong type of air filter. The new pleated filters sold block to much air flow. If air mass flow rate drops the difference in temperatur go up and when the difference in temperature go up, it gets nearer the high limit and causes it to trip. All pleated filters drop normal air flow through ducts by at least 35%. To make your air duct system work properly use the what is called throw away filters which cost about 1/3 the cost of the pleated filter. Remember to either clean or change the throw away filter monthly to reduce dirt being drawn into your duct system.
Hope this helps.

Feb 13, 2015 | Heating & Cooling

2 Answers

how to same money on your heating bill

There are several ways to save money on your heating bill.

First and probably the cheapest is to change your air filter in your furnace. The more air flow restrictions you have the harder the fan motor has to work, making it less efficient. A side note, I always recommend to my customers to get the reusable filters, they cost a little more but you never have to buy a filter again.

Next you should look into getting a programmable thermostat, this way you can program your heater for when you're away, sleeping, weekends etc. When programming your furnace, never turn the furnace completely off when you are away. It will cost you more to heat your home when there's no heat in the home. Just let it maintain a lower temp while you're gone during the day.

Now lets look at the furnace itself, how efficient is it? How old is it? I can tell you that anything over 15 years should be considered changed out to a more efficient one. With all the government and utility company rebates you could save some good money on one. I have also seen heating bills cut in half due to a newer more efficient furnace.

Hope this helps

Feb 26, 2013 | The Companion Group Kozy World Portable...

2 Answers

I install the filters in my york furnance and now heat fan just runs. take out the filters furnace works fine

Did you happen to notice with the filters in a blinking light on the PC Board? You may have to look through a small viewing port in the lower section of the front panel because if you open the filter door, you will erase the code. If you get a blinking code, look at the reverse side of the top front panel for a wiring diagram and diagnostic error code chart. It will direct you to where you should start looking. I suspect you may have registers closed and not enough returning air to the furnace.

Mar 05, 2011 | Heating & Cooling

1 Answer

I have a RUUD Furnace / AC and need pleated 21 x 28 x 4 filters with #10 efficency rating.



Mar 31, 2010 | Ruud UBHC Air Conditioner

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