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Always allow electronic parts to warm up to room temperature before applying power.

Rheem Ruud Furnace Control Board 62-25338-01

I remind myself of a terrible experience I had several years ago when I brought my desktop computer in from a cold car, plugged it in and fried the mother board! I found out the hard way that it is always a good idea to allow an electronic part like control boards, pressure switches, televisions, laptops, etc. to warm up to room temperature before applying power. If you bring anything in from the cold outdoors into a warm home, condensation (water) will form on the part. We all know that water is a conductor. We can see why so many electronic parts can get destroyed if we do not allow them to warm up before applying power.  I would strongly suggest that we allow the electronic parts and devices to sit for a couple of hours for warm up. This allows time for the water condensation to evaporate before applying power. I hope this will save you and others from problems. God bless you all!

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Aprilaire 500 Humidifier Maintenance Video

Aprilaire 550560

Below we have an Aprilaire humidifier 500 maintenance video made by HVAC.com. Many thanks to HVAC.com for making this informative video! This video shows you step by step how to perform the seasonal maintenance on your Aprilaire 500 Bypass Whole Home Humidifier. In the video it shows how to check the water feed tube, the strainer, the drain tube, the drain spud, the orifice, and the water panel. All of these are important parts that ensure your humidifiers performance and efficiency. Please click here if you would like to see the parts and supplies that we sell for the Aprilaire Model 500 series humidifiers. Please email us anytime if you have questions. Our email address is: support@arnoldservice.com. We would love to help you out and have your business!

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Aprilaire 700, 760, 768 Fan Powered Humidifier Maintenance Video

aprilaire 700

Below we have an Aprilaire Fan Powered Humidifier Maintenance Video made by HVAC.com. Many thanks to HVAC.com for making this informative video. This video will show step by step how to service your Aprilaire 700, Aprilaire 700M, Aprilaire 760, Aprilaire 768 fan powered humidifier. Please click here if you would like to see the Aprilaire humidifier parts and supplies that we sell for the Aprilaire model 700 series humidifiers. If you have any questions please email us anytime: support@arnoldservice.com  or comment below. We would love to help you out and have your business!

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Aprilaire Model 401 Filter Instructions

HVAC troubleshooting videos

Below we have a YouTube Video made by Santa Fe Air Conditioning and Heating which shows how to install the Aprilaire 201 and 401 filter. We sell the Aprilaire Model 401 filters on the following page: Please click here if you would like to see the Aprilaire 401 filters that we sell. If you have any questions please email us anytime: support@arnoldservice.com We would love to help you out and have your business!

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I forgot how to wire up the dual round capacitor that I purchased from you. How do I go about wiring it up so it doesn’t blow the capacitor up again?

Question: I forgot how to wire up the dual round capacitor that I purchased from you. How do I go about wiring it up so it doesn’t blow the capacitor up again?
Answer: Thanks for your interest in our web site! You would need to look at the wiring diagram that came with the unit. Usually the wiring diagram is glued to one of the panels on the air conditioner. Hope you can read it. Rule of thumb on wiring the capacitor is: Herm on capacitor goes to the start winding on the compressor, Fan on capacitor goes to brown fan wire that goes to the fan, and Com on the capacitor comes off one leg of the contactor to provide power to the capacitor. There are usually more than one wire connected to the Com terminal. The Com terminal is used so other components of the air conditioner can steal power off the Com connection. We have a really good YouTube Video below that shows how to change and wire a capacitor on an air conditioning unit. I hope this post and video helps you out. We sell capacitors on the following page: Please click here if you would like to see some of the 60 or more different capacitors that we sell.  If you have any questions please let us know. Our email is support@arnoldservice.com

We would love to help you out and earn your business!


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Is there an easy way to clean an evaporator coil?

Answer: There is not easy way to clean an evaporator coil that I know of. When I was servicing furnaces (clean and check). I would always take the blower out of the furnace, clean the blower wheel and blower motor. While I had the blower out I would look up through the heat exchanger with a flash light to see if the evaporator really needed cleaning. This requires sliding in the furnace blower compartment on your back and shining a flashlight up so you can see if the bottom of the evaporator is dirty or not. I did not want to go through the trouble of taking the sheet metal off from around the evaporator and find that it was not dirty and I had wasted my time so while I had the blower out it was easy to inspect the bottom of the evaporator coil. If the evaporator coil was dirty and while the blower was out I would use a spray coil cleaner, a fin comb and a vacuum cleaner to clean the coil. It is quiet time consuming, but I was motivated by knowing that if the coil was dirty and stopped up the customer would notice a big difference in their heating and cooling air flow and their heating and cooling bill.