Frequently Asked Questions (FAQ's)

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About Us

UndermountAC is who we re-branded as after our focus shifted from Truma Combi heaters to offering 12V undermount Air Conditioners.
Since we can no longer source Truma Combi heaters, and shifted our focus to 12V undermount air conditioners, we chose to discontinue the use of the TrumaHeaters.com name and website and re-brand as UndermountAC.com to be in line with what we can offer on a recurring basis.
No, you can expect to receive the same service and the same quick response times. Nothing has changed on this end.
Yes, absolutely. The company has not changed, the warranties are in place and we will 100% support our previous customers for the forceable future. Our shelves are full of parts to do just that.


Absolutely! This store is powered by Shopify. It is a trusted platform, and guaranteed secure. Your payment can be made however you choose. You may pay by Credit Card via Shopify Payments, Google Pay, Apple Pay or Paypal. You are both protected by the merchant account and your Credit Card. If you prefer, we also sell on eBay, however eBay fees will be added to the overall cost. Our eBay Page: Click here We fully understand trust is important. Feel free to reach out to us.
We exclusively use UPS. Your order will be processed and shipped usually within 1 business day. UPS Standard typically guarantees delivery within 1-5 business days depending on location.
Your order will ship from our warehouse in Southern Ontario, Canada.
If you live in the United States we are not obligated to charge any sales tax. All necessary customs forms will be filled out and taken care of for a seamless transaction with no additional costs to you. If you are located in Canada, we are obligated to charge sales tax based on location, Ontario residents are subject to HST.

Truma Combi

At this time we have exhausted all possible avenue's to replace our depleted and depleting stock. Unfortunately Truma North America still insists only OEM manufactures may install or purchase Combi's, and the cost of purchase and shipping from Germany far exceeds the value a Combi provides. Once our stock is depleted, we will no longer offer the Combi for Sale.


Yes, we are offering a 1 year parts warranty from the time you install the unit. We have dedicated parts and units set aside to make sure we can support our customers for the foreseeable future. Minor issues can be addressed with a UPS parts replacement shipment, and larger issues by a unit exchange program.
We will be here for you. After your warranty period is over, we will happily sell you replacement parts at a very reasonable cost, expedite ship them to your location regardless of where you are at our cost. We will offer all replacement parts available to our customers. Parts that we do not have in stock, we will order from our European Truma Dealer partner. Most issues are very simple in nature and a quick diagnosis can be made via email or phone. If for whatever reason we can not diagnose over the phone, and removing the unit to ship it back is not feasible, we will lend you a Truma diagnostic tool and laptop, this tool with a single keystroke will run though the entire unit step by step automatically and tell you exactly what is wrong, and why. .
No, Truma North America will not honour your warranty, nor can you register for an extended warranty. Truma only honours warranties on units installed by a certified installer when the RV was manufactured. It will not honour a warranty on a unit installed by the aftermarket. However, you are fully covered by our in-house warranty. This however does not stop certified installer or dealers from working on, repairing or diagnosing your Truma Combi.