2011 Chevy avalanche seat heaters the backs works but the bottoms don't thought the heater pads were bad but the New ones ohms out the same as the old ones any thoughts on what's wrong

Question edited for clarity and toss in some CAPS.
Question moved to model category.

Check the connections to the module and the element. There is help in the forums and videos as well, although not all on the Ford Flex, the idea is the same.

Seat heater doesn't work - Ford Flex Forum

FordFlex.net https://www.fordflex.net > ... > Recalls and TSBs
Apr 19, 2012 - The driver side seat heater for my 2009 Flex stopped working. The dealer says that it is the heating element and is $500 to replace and of ...

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Trying to test my 2009 Ford flex driver side heated seat

JustAnswer https://www.justanswer.com > Ford Repair
Jan 24, 2019 - If the resistance reading of step 2 shows proper value, perform an amperage draw test of the heater elements by applying power to the YE/BU wire ...

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Ford Flex Seat Heater Control Module - 9U5Z14C724A

Lakeland Ford Parts https://parts.lakelandford.com > Ford__Flex > Seat-He...
Buy Ford Flex Seat Heater Control Module. Seat Heater Control Module - Repair or Replace Has your Seats, Left, CUSHION - OEM Ford Part # 9U5Z14C724A (9U5Z- ...
Rating: 4.8 · ‎3,386 reviews‎

Drivers side seat heater repair and costs - Page 2

My Ford Freestyle https://www.myfordfreestyle.com > forums > viewtopic
Dec 11, 2009 - I checked all connections under the seat. The bottom pad has a 4 wire pin connector and the back has a 3 wire pin connector.

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DTC B2430 Passenger Seat Heater Circuit

Do you know what DTC'S - diagnostic trouble code's are ?

The driver and passenger seat heaters are controlled by the driver seat module. Power is supplied to the driver seat cushion and back heater elements through individual voltage supply circuits. Power is supplied to the passenger seat cushion and back heater elements through a common voltage supply circuit. All of the driver and passenger seat heater elements are grounded by the driver seat module through individual low side drive control circuits. The heater element control circuits are pulse width modulated to ground by the driver seat module in order to control the seat temperatures by regulating the current flow through the heater elements.
Your best bet , take it to a qualified repair shop that has diagnostic scanner that can read this code's

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DTC B2430 Passenger Seat Heater Circuit

Do you know what DTC'S - diagnostic trouble code's are ?

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DTC B2435 Driver Seat Back Heater Sensor Circuit

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DTC B2440 Passenger Seat Back Heater Sensor Circuit

The driver seat module relies on inputs from thermistors installed in the driver and passenger seat backs to control heated seat temperatures. The thermistors are 2-wire sensors supplied with a 5-volt referenced signal circuit and low reference circuit from the driver seat module. Resistance through the thermistors varies with temperature causing the heated seat sensor signal circuit voltage levels to decrease as the seat back temperatures rise.

what is your question either resubmit or edit your request

The problem seems to be in the switch. Either remove switch, take apart and clean, or just replace the switch with new one. GOOD LUCK FRIEND.

sounds like a bad switch

with all heaters,
blown fuse
bad switch
bad wires
bad heater.
what we do is check fuses first the use a voltemeter
to find the point that is open circuit.
this works every time. heater good.
if power makes it to the heater and its dead, then its dead.
(measure the ohms, (resistance) infinity is dead open
low ohms is good. say about 12 ohms would be 1 amp.
or 12watts, less homes is more watts. (im not looking that up, its in the shop manual and at alldata dot com , every day.

To install the new heating element the seat covering will need to be pulled apart so that new heater can be installed. you will need to ring the fastener and carefully pull covering back, to have room to remove old one and wires.

Faulty seat heater pad or seat heater switch.I would first check the switch connections and fuse.

look under the seat there is a large plug that feeds power to the seat

If the buttons light up when you turn them on then the fuse is good.What usually happens is the element of the heater part burns or break and the heater will not work.This is a 2 part heater.One for the back and one for the bottom.If one goes neither of them will work.You have to ohm both to see which one is bad and replace it.Usually the bottom because it takes the most abuse.If the light does not come on then check the fuses and check connections under the seat.Good luck.