Over the years, Marantec has changed the frequency of its receivers a few times, as have most other gdo manufacturers, in order to avoid radio frequency interference from competing services. Marantec apparently used/uses 40 Mhz in Europe. In America, 40 Mhz is used by either military or aircraft, and so is quite subject to interference in certain areas. Marantec changed its receiver frequency to 390 Mhz to avoid that interference, along with several other major gdo manufacturers, and then to 315 Mhz as did both Genie and Liftmaster. What this means for the user, is that if you have any of the earlier frequency machines, and need a new remote, you will be obligated to use a frequency conversion kit (which is actually an external receiver) to make your machine respond to the currently available 315 Mhz frequency.
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| Marantec M3-2432 433 Mhz remote control |
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| Marantec M3-2312 315 Mhz remote control |
IMPORTANT NOTE: Marantec also makes a rare, but not endangered, remote in 433 Mhz. This frequency is commonly needed in the vicinity of large US military bases, because the military uses many different frequencies, but 433Mhz is relatively safe from interference. The biggest problem is that the remotes for 433 Mhz look exactly like the remotes for 315 Mhz. The best part is that Marantec may be the only gdo manufacturer that marks the transmitting frequency on the remote body along with the model number. This makes it relatively easy to determine which frequency system you have. Also note that, although the photos are slightly different sizes, the actual remotes are identical except for the innards, and the nomenclature (label information). If in doubt about which frequency your Marantec operates on, call the experts at garagedoorsupplyco.com by phone at: 888-346-3173. They are happy to assist.
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