Carrier RTU display T-409
I’m working on a Carrier RTU that has a ComfortLink controller. The unit is in alarm, and the read out displays T-409. The installation manual is not with the unit. Can anyone help me figure out what...
View ArticleRe: Carrier RTU display T-409
Hi Christopher! Welcome to HVAC Assistant and the Industry Forum. The T409 Alarm can be triggered by any of the following: Fan Status Switch ON, Contactor OFF Fan Status Switch OFF, Contactor ON Fan...
View ArticleForum Conduct
If you are not an HVAC Professional, please post in the Consumer Questions. HVAC Assistant Industry Forums are provided to Industry Professionals as a communication tool for sharing HVAC knowledge. In...
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Here is what I feel is the most important rule to remember while troubleshooting: USE FACTS TO FIND THEORIES, NOT THEORIES TO FIND FACTS Sounds simple enough... However, many of the technicians that I...
View ArticleRe: #1 Rule of Troubleshooting
Hi Johnny! Welcome to HVAC Assistant and the Industry Forum. Thanks for posting. Sounds like good advice for all of us.
View ArticleCritical Items To Check On Every Service Call
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View ArticleRe: Keeping Cool in Extreme Heat
I like to freeze a few small damp towels at night, and put them in my cooler each morning with some ice packs. I use the towels throughout the day to wrap around my neck or drape over my head. The...
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View ArticleCarrier PremierLink 33CSPREMLK Version/Fan Operation
Version 1.3 Firmware – Attempting to take direct control of the fan output may cause undesirable results. Version 1.6 Firmware – The fan output can be directly controlled without issue. Version 2.0...
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