I just bought a house. The furnace is all elec. 2004 Ruud Achiever 14 air handler. I found only one model # which is UBHK-24J18SFA. I have no books. The people that owned it before passed away. It has a really old electronic filter I can see through. There is not a filter in the unit but there is a spot for one and a tag on the door that reads ''do not operate without filter in place''. I have been told I dont need one and that I do need one. I dont know what kind of filter it takes, if the filter is washable or not, if there is some kind of fram or something that holds the filter, and where can I get the parts I need if any. Thanks for your help!
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Re: No furnace filter
Using a electronic air cleaner you don't need a filter they have little pre filters in front of them but those electronic air cleaner are so good at removing dust and hair. I am thinking of getting one. to take the air cleaners take them out every so often and wash them with just your garden hose let them dry and re-install. If you want to replace the air cleaner go get a filter called Air Bear they are made to be a direct replacement for Electronic Air Cleaner units. ken oh by the way air bear's are about 5 inches thick and come in vary sizes.
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Can you see the condition of the coil itself? If it is blocked this could be a cause for the frozen coils. Also, check the condition of the blades on the indoor fan. Dirt and dust accumulation on the blades reduces airflow.
What's wrong with your current AHU? Any Ruud dealer can assist you. Most 4 ton units work with r-22 or 410a. As a side note, most parts in an air handler can be replaced unless the case is rusted thru.
I'm using a calculation of VxA=W. Assuming your system is 240 volts and total amperage of system with 15 amps, I come up with 3600 watts or 3.2KW. Because the outdoor temp was above 35 deg F, the electric heaters probably did not cyle on to frequently if at all. Your calculation sounds reasonable to me. To determine exactly how many KW your system is using, you will need to determine exactly how many volts and amps your unit is running at...both indoor and outdoor units if this is a split system.
I've included a link to a website that helps the homeowner to determine the KWh.
I hope you found this helpful and good luck in your endeavor! :-)
Indoor coil freeze-up is always caused by lack of airflow over the coil. Check your filters, check the coil to be sure it has not been blanketed by dust that bypassed ir went through the filter, check that all vents in the house are open. Indoor coil freeze-up is NEVER a condition of undercharge, and any technician who attempts to make frost go away by adding freon does not understand thermodynamics. The only other reason you could have freeze-up is the unit is over-sized, but I suspect that is not the problem since you have had it since 2002.
First make sure unit is level. Drain pan may be dirty. On the rheem or Ruud unit the back of the pan gets stopped up. Ithas small holes that let the water by and they get stopped up. Now even though your drain is clean you may have a stopped up dain pan. Check this > These are problems you can take care of your self. Open up the top panel of your unit and you can look down on the drain pan. Check for dirt and stoppage near the outlet of the drain pan. You amy also have a cracked drain pan but I doubt it. Rus
1. often there is a central return in the house. This is the place where the air gets pulled back to the unit and is likely very close to your thermostat. Check for a filtered louvered grill there and see if your filter is located here. If so, you can access the filter by opening the filter frame with a screwdriver or even a coin.
2. Otherwise I would expect that your filter is on the return-air side of your air handler (where the blower is) Older models have the filter actually inside the air handler in the blower compartment. Newer models may have a small separate filter door. I'd look in these areas.
Check your filters inside the furnace, replace if needed. Then check to ensure that the fan is running inside the furnace. If these two things dont fix the problems, I would imagine you have low refrigerant issues. In that case you should call a service company.
here is a basic wiring diagram for all air cond systems your thermostat consist of treminal r w y and c run a four conductor wire fromm thermostat to ai handler the air handler should allso have eather have red blue white wires or a teminal block marked r w c r stands for red w for white c for comon allso blue run color for color from the thermostat to ai handler with exeption of yellow yellow runs straigth to condenserand retuns in white wire to air handler wich gets conected to comon hope this help[s you