A few years back I wanted to upgrade my coach to LED lighting. I tried a few of the cheap package deals and was very disappointed in life and color choices. This topic came up on the irv2 forum and many folks rallied around M4 products. So I took their advise and bought enough LED of the elite series to do all of the ceiling lights in this present coach.
I am very disappointed in the results. Most of the first batch of bulbs failed within a few months. I was told by M4 customer support that my coach had a DC voltage problem and that it was causing their LEDs to fail. They did replace several of them. Then, over time, the new ones started randomly flashing on and off.
Around the same time I was converting over to LEDs my thermostat started to act up. It would freeze up so I had no control over the zones and display the dreaded "00".
The RV gremlins were having a field day with me. I was convinced I had a bad DC line. I spent days looking for problems. Noise must be getting introduced from somewhere. I looked at it with an automotive oscilloscope and did see some "ringing" noise. I posted the picture and a fellow, more astute than I, RVer said that this was common. I called Magnum and presented the problem to them. They admitted that their inverters have a bit of noise but didn't see that mine was any worse than the norm. Then I called RVP about the thermostat. The guy I talked with was well aware of what I was seeing. He suggested a filter at the thermostat. I already had installed one. Next he said to shut off DC loads. When the problem disappeared I had found the source of the trouble.
I started by shutting all switchable DC loads off or disconnecting from the power ports. One at a time I started turning circuits on and would wait a while. With one set of ceiling lights on I got the "00". Lights off, "00" gone. Pulled all the lamps accept one. Lights on... no problem. Another bulb in and so forth. I had several bulbs that were causing noise in the DC. I was outside warranty so I simply bought more M4 LEDs thinking I might have just run into a bad batch.
Long story short. Almost every bulb I have bought from M4 has caused problems with the thermostat or failed. I have a few left but I am replacing them with other brands.
I don't like to make reports like this one, especially when the folks I have dealt with at the place of purchase have been sincere in trying to assist me. But the facts remain. The elite product line is not of a stable or of good quality from my personal experience.
What are your thoughts?
Rick